Related literature {#sec1}
==================

For the biological activity of thio­phene derivatives, see: Graff *et al.* (2005[@bb5]); Hymete *et al.* (2005[@bb6]); Tapia *et al.* (2003[@bb11]); Dallemagne *et al.* (2003[@bb3]). For related structures see: Dufresne & Skene (2008[@bb4]); Khan *et al.* (2004[@bb7]). For graph-set notation see: Bernstein *et al.* (1995[@bb1]).

Experimental {#sec2}
============

 {#sec2.1}

### Crystal data {#sec2.1.1}

C~18~H~20~O~8~S~2~*M* *~r~* = 428.46Triclinic,*a* = 9.3214 (5) Å*b* = 10.2416 (6) Å*c* = 10.6622 (6) Åα = 84.952 (3)°β = 82.814 (4)°γ = 75.432 (3)°*V* = 975.72 (9) Å^3^*Z* = 2Mo *K*α radiationμ = 0.32 mm^−1^*T* = 295 K0.29 × 0.14 × 0.12 mm

### Data collection {#sec2.1.2}

Bruker Kappa APEXII CCD diffractometerAbsorption correction: multi-scan (*SADABS*; Sheldrick, 1996[@bb8]) *T* ~min~ = 0.914, *T* ~max~ = 0.96325739 measured reflections6686 independent reflections4444 reflections with *I* \> 2σ(*I*)*R* ~int~ = 0.025

### Refinement {#sec2.1.3}

*R*\[*F* ^2^ \> 2σ(*F* ^2^)\] = 0.057*wR*(*F* ^2^) = 0.188*S* = 1.046686 reflections279 parameters4 restraintsH-atom parameters constrainedΔρ~max~ = 0.82 e Å^−3^Δρ~min~ = −0.59 e Å^−3^

 {#d5e520}

Data collection: *APEX2* (Bruker, 2004[@bb2]); cell refinement: *SAINT* (Bruker, 2004[@bb2]); data reduction: *SAINT*; program(s) used to solve structure: *SHELXS97* (Sheldrick, 2008[@bb9]); program(s) used to refine structure: *SHELXL97* (Sheldrick, 2008[@bb9]); molecular graphics: *PLATON* (Spek, 2009[@bb10]); software used to prepare material for publication: *SHELXL97*.

Supplementary Material
======================

Crystal structure: contains datablocks global, I. DOI: [10.1107/S1600536809036149/bt5053sup1.cif](http://dx.doi.org/10.1107/S1600536809036149/bt5053sup1.cif)

Structure factors: contains datablocks I. DOI: [10.1107/S1600536809036149/bt5053Isup2.hkl](http://dx.doi.org/10.1107/S1600536809036149/bt5053Isup2.hkl)

Additional supplementary materials: [crystallographic information](http://scripts.iucr.org/cgi-bin/sendsupfiles?bt5053&file=bt5053sup0.html&mime=text/html); [3D view](http://scripts.iucr.org/cgi-bin/sendcif?bt5053sup1&Qmime=cif); [checkCIF report](http://scripts.iucr.org/cgi-bin/paper?bt5053&checkcif=yes)

Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: [BT5053](http://scripts.iucr.org/cgi-bin/sendsup?bt5053)).

BG thanks the management of AMET University, India, for their kind support and SAIF, IIT, Madras, India, for the data collection.

Comment
=======

Thiophene derivatives exhibit anti-inflammatory (Graff *et al.*, 2005; Hymete *et al.*, 2005), anti-protozoal (Tapia *et al.*, 2003) and antitumor (Dallemagne *et al.*, 2003) activities. The geometric parameters of the title compound (Fig. 1) agree with the reported similar structures (Dufresne & Skene, 2008; Khan *et al.*, 2004).

The dihedral angle between the two thiophene rings is 2.33 (7)°. The terminal C atoms of the ester groups are disordered over two positions (the site occupancies of C9 and C9A are 0.37 (2) and 0.63 (2), respectively and C18 and C18A are 0.62 (2) and 0.38 (2), respectively).

The molecular structure is stabilized by weak intramolecular C---H···O interactions and the crystal structure is through weak intermolecular C---H···O interactions. The intramolecular C17---H17C···O8 interaction generate five-membered ring, with graph set motif S(5) and C10---H10A···O2 and C13---H13B···O8 interactions generate six-membered rings, each with graph set motif S(6). The intermolecular C10---H10B···O6 interaction generates an eighteen-membered ring, with graph set motif of *R*~2~^2^(18) (Bernstein *et al.*, 1995).

Experimental {#experimental}
============

To a solution of diethyl 3,4-dibromomethylthieno\[2,3,-b\]thiophene-2,5-dicarboxylate (2 g, 4.25 mmol) in dimethyl formamide (10 ml) was added potassium acetate (1.67 g, 17.0 mmol). The reaction mixture was allowed to stir at room temperature for 5 h under nitrogen atmosphere. The reaction mixture was poured over crushed ice (50 g) containing 1 ml of conc. HCl. The obtained solid was filtered and dried. Recrystallization from methanol afforded the compound.

Refinement {#refinement}
==========

The site occupancy factors of disordered C atoms were refined as C9 = 0.37 (2), C9A = 0.63 (2), C18 = 0.62 (2) and C18A = 0.38 (2) during anisotropic refinement. The C8---C9, C8---C9A, C17---C18 and C17---C18A bond distances were restrained to be 1.500 (1) Å. H atoms were positioned geometrically and refined using riding model with C---H = 0.97 Å and *U*~iso~(H) = 1.2Ueq(C) for CH~2~, C---H = 0.96 Å and *U*~iso~(H) = 1.5Ueq(C) for CH~3~.

Figures
=======

![The molecular structure of the title compound, with atom labels and 30% probability displacement ellipsoids for non-H atoms.](e-65-o2455-fig1){#Fap1}

![The packing of the title compound, viewed down the C axis. Hydrogen bonds are shown as dashed lines.](e-65-o2455-fig2){#Fap2}

Crystal data {#tablewrapcrystaldatalong}
============

  ----------------------- ---------------------------------------
  C~18~H~20~O~8~S~2~      *Z* = 2
  *M~r~* = 428.46         *F*(000) = 448
  Triclinic, *P*1         *D*~x~ = 1.458 Mg m^−3^
  Hall symbol: -P 1       Mo *K*α radiation, λ = 0.71073 Å
  *a* = 9.3214 (5) Å      Cell parameters from 5319 reflections
  *b* = 10.2416 (6) Å     θ = 2.7--31.0°
  *c* = 10.6622 (6) Å     µ = 0.32 mm^−1^
  α = 84.952 (3)°         *T* = 295 K
  β = 82.814 (4)°         Needle, colourless
  γ = 75.432 (3)°         0.29 × 0.14 × 0.12 mm
  *V* = 975.72 (9) Å^3^   
  ----------------------- ---------------------------------------

Data collection {#tablewrapdatacollectionlong}
===============

  --------------------------------------------------------------- --------------------------------------
  Bruker Kappa APEX2 CCD diffractometer                           6686 independent reflections
  Radiation source: fine-focus sealed tube                        4444 reflections with *I* \> 2σ(*I*)
  graphite                                                        *R*~int~ = 0.025
  Detector resolution: 0 pixels mm^-1^                            θ~max~ = 32.0°, θ~min~ = 1.9°
  ω and φ scans                                                   *h* = −13→13
  Absorption correction: multi-scan (*SADABS*; Sheldrick, 1996)   *k* = −15→13
  *T*~min~ = 0.914, *T*~max~ = 0.963                              *l* = −15→15
  25739 measured reflections                                      
  --------------------------------------------------------------- --------------------------------------

Refinement {#tablewraprefinementdatalong}
==========

  ------------------------------------- -------------------------------------------------------------------------------------------------
  Refinement on *F*^2^                  Primary atom site location: structure-invariant direct methods
  Least-squares matrix: full            Secondary atom site location: difference Fourier map
  *R*\[*F*^2^ \> 2σ(*F*^2^)\] = 0.057   Hydrogen site location: inferred from neighbouring sites
  *wR*(*F*^2^) = 0.188                  H-atom parameters constrained
  *S* = 1.04                            *w* = 1/\[σ^2^(*F*~o~^2^) + (0.0945*P*)^2^ + 0.3857*P*\] where *P* = (*F*~o~^2^ + 2*F*~c~^2^)/3
  6686 reflections                      (Δ/σ)~max~ \< 0.001
  279 parameters                        Δρ~max~ = 0.82 e Å^−3^
  4 restraints                          Δρ~min~ = −0.59 e Å^−3^
  ------------------------------------- -------------------------------------------------------------------------------------------------

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å^2^) {#tablewrapcoords}
==================================================================================================

  ------ -------------- -------------- -------------- -------------------- ------------
         *x*            *y*            *z*            *U*~iso~\*/*U*~eq~   Occ. (\<1)
  S1     0.02951 (5)    0.21624 (6)    0.28483 (5)    0.04706 (15)         
  S2     −0.08189 (5)   0.30619 (5)    0.55975 (5)    0.04537 (15)         
  O1     0.1876 (2)     0.1299 (2)     0.05271 (17)   0.0747 (5)           
  O2     0.4020 (2)     0.1825 (3)     0.0622 (2)     0.0920 (7)           
  O3     0.51977 (16)   0.15799 (15)   0.36366 (18)   0.0544 (4)           
  O4     0.70351 (19)   0.25297 (19)   0.3848 (2)     0.0719 (5)           
  O5     0.40617 (17)   0.27623 (16)   0.65075 (16)   0.0533 (4)           
  O6     0.5449 (3)     0.4048 (2)     0.7014 (3)     0.0978 (8)           
  O7     −0.1209 (3)    0.3926 (2)     0.80902 (18)   0.0821 (6)           
  O8     0.1045 (3)     0.4242 (3)     0.8232 (2)     0.1029 (9)           
  C1     0.2123 (2)     0.2247 (2)     0.2352 (2)     0.0483 (5)           
  C2     0.2772 (2)     0.2731 (2)     0.3227 (2)     0.0463 (4)           
  C3     0.1771 (2)     0.30467 (19)   0.4351 (2)     0.0424 (4)           
  C4     0.1817 (2)     0.3531 (2)     0.5561 (2)     0.0469 (5)           
  C5     0.0511 (3)     0.3560 (2)     0.6319 (2)     0.0483 (5)           
  C6     0.0398 (2)     0.2773 (2)     0.42631 (19)   0.0406 (4)           
  C7     0.2789 (3)     0.1791 (3)     0.1093 (2)     0.0592 (6)           
  C8     0.2451 (5)     0.0815 (5)     −0.0725 (3)    0.0994 (12)          
  H8A    0.3523         0.0700         −0.0854        0.119\*              0.368 (18)
  H8B    0.2009         0.1469         −0.1369        0.119\*              0.368 (18)
  H8C    0.2708         0.1540         −0.1285        0.119\*              0.632 (18)
  H8D    0.3340         0.0087         −0.0667        0.119\*              0.632 (18)
  C9     0.208 (3)      −0.0509 (13)   −0.0829 (17)   0.148 (7)            0.368 (18)
  H9A    0.1181         −0.0543        −0.0286        0.223\*              0.368 (18)
  H9B    0.2880         −0.1235        −0.0579        0.223\*              0.368 (18)
  H9C    0.1924         −0.0595        −0.1689        0.223\*              0.368 (18)
  C9A    0.1272 (9)     0.0290 (14)    −0.1206 (8)    0.112 (4)            0.632 (18)
  H9A1   0.1651         −0.0102        −0.2003        0.168\*              0.632 (18)
  H9A2   0.0413         0.1020         −0.1316        0.168\*              0.632 (18)
  H9A3   0.0998         −0.0385        −0.0606        0.168\*              0.632 (18)
  C10    0.4373 (2)     0.2825 (2)     0.3058 (3)     0.0538 (5)           
  H10A   0.4724         0.2915         0.2167         0.065\*              
  H10B   0.4480         0.3596         0.3472         0.065\*              
  C11    0.6524 (2)     0.1574 (2)     0.3979 (2)     0.0457 (4)           
  C12    0.7265 (3)     0.0225 (3)     0.4536 (3)     0.0755 (8)           
  H12A   0.7131         −0.0469        0.4044         0.113\*              
  H12B   0.6830         0.0110         0.5391         0.113\*              
  H12C   0.8310         0.0164         0.4532         0.113\*              
  C13    0.3113 (3)     0.3958 (2)     0.5957 (3)     0.0562 (6)           
  H13A   0.3653         0.4326         0.5231         0.067\*              
  H13B   0.2769         0.4644         0.6572         0.067\*              
  C14    0.5192 (2)     0.2971 (2)     0.7048 (2)     0.0508 (5)           
  C15    0.6043 (3)     0.1712 (3)     0.7674 (3)     0.0684 (7)           
  H15A   0.7092         0.1640         0.7472         0.103\*              
  H15B   0.5792         0.0946         0.7381         0.103\*              
  H15C   0.5796         0.1736         0.8575         0.103\*              
  C16    0.0166 (4)     0.3957 (3)     0.7634 (2)     0.0638 (6)           
  C17    −0.1557 (5)    0.4318 (5)     0.9381 (3)     0.1211 (17)          
  H17A   −0.1449        0.5229         0.9429         0.145\*              0.368 (18)
  H17B   −0.0876        0.3714         0.9916         0.145\*              0.368 (18)
  H17C   −0.0621        0.4205         0.9736         0.145\*              0.632 (18)
  H17D   −0.2071        0.5267         0.9393         0.145\*              0.632 (18)
  C18    −0.3127 (7)    0.4253 (12)    0.9829 (7)     0.097 (3)            0.623 (17)
  H18A   −0.3228        0.3352         0.9769         0.146\*              0.623 (17)
  H18B   −0.3796        0.4871         0.9311         0.146\*              0.623 (17)
  H18C   −0.3361        0.4495         1.0693         0.146\*              0.623 (17)
  C18A   −0.238 (2)     0.3432 (15)    1.0223 (10)    0.107 (5)            0.377 (17)
  H18D   −0.2882        0.3907         1.0951         0.161\*              0.377 (17)
  H18E   −0.1680        0.2625         1.0491         0.161\*              0.377 (17)
  H18F   −0.3090        0.3197         0.9766         0.161\*              0.377 (17)
  ------ -------------- -------------- -------------- -------------------- ------------

Atomic displacement parameters (Å^2^) {#tablewrapadps}
=====================================

  ------ ------------- ------------- ------------- -------------- --------------- --------------
         *U*^11^       *U*^22^       *U*^33^       *U*^12^        *U*^13^         *U*^23^
  S1     0.0368 (2)    0.0638 (3)    0.0455 (3)    −0.0180 (2)    −0.00627 (18)   −0.0101 (2)
  S2     0.0411 (2)    0.0553 (3)    0.0445 (3)    −0.0177 (2)    −0.00618 (19)   −0.0085 (2)
  O1     0.0760 (12)   0.1018 (15)   0.0518 (10)   −0.0349 (11)   0.0117 (9)      −0.0219 (10)
  O2     0.0605 (12)   0.1266 (19)   0.0884 (15)   −0.0303 (12)   0.0247 (11)     −0.0275 (14)
  O3     0.0380 (7)    0.0491 (8)    0.0796 (11)   −0.0164 (6)    −0.0142 (7)     0.0062 (7)
  O4     0.0470 (9)    0.0678 (11)   0.1098 (16)   −0.0236 (8)    −0.0231 (9)     −0.0044 (10)
  O5     0.0529 (8)    0.0509 (8)    0.0645 (10)   −0.0197 (7)    −0.0264 (7)     0.0003 (7)
  O6     0.0878 (15)   0.0713 (13)   0.158 (2)     −0.0391 (11)   −0.0728 (16)    0.0083 (14)
  O7     0.1042 (16)   0.1005 (15)   0.0523 (10)   −0.0420 (13)   0.0034 (10)     −0.0294 (10)
  O8     0.129 (2)     0.140 (2)     0.0676 (13)   −0.0686 (18)   −0.0257 (13)    −0.0312 (14)
  C1     0.0373 (9)    0.0561 (12)   0.0520 (11)   −0.0139 (8)    −0.0019 (8)     −0.0022 (9)
  C2     0.0342 (8)    0.0440 (10)   0.0619 (13)   −0.0129 (7)    −0.0082 (8)     0.0040 (9)
  C3     0.0367 (8)    0.0394 (9)    0.0552 (11)   −0.0144 (7)    −0.0140 (8)     0.0029 (8)
  C4     0.0493 (10)   0.0414 (10)   0.0585 (12)   −0.0200 (8)    −0.0232 (9)     0.0021 (8)
  C5     0.0560 (11)   0.0487 (11)   0.0474 (11)   −0.0197 (9)    −0.0174 (9)     −0.0040 (8)
  C6     0.0351 (8)    0.0462 (10)   0.0440 (10)   −0.0136 (7)    −0.0092 (7)     −0.0034 (8)
  C7     0.0542 (12)   0.0617 (14)   0.0585 (14)   −0.0143 (11)   0.0064 (10)     −0.0038 (11)
  C8     0.118 (3)     0.129 (3)     0.0556 (17)   −0.046 (3)     0.0230 (18)     −0.0279 (19)
  C9     0.175 (18)    0.139 (13)    0.103 (11)    0.008 (13)     0.002 (11)      −0.009 (10)
  C9A    0.131 (7)     0.137 (8)     0.078 (5)     −0.048 (6)     0.011 (4)       −0.048 (5)
  C10    0.0348 (9)    0.0542 (12)   0.0741 (15)   −0.0175 (8)    −0.0085 (9)     0.0105 (10)
  C11    0.0328 (8)    0.0577 (12)   0.0477 (11)   −0.0132 (8)    −0.0030 (7)     −0.0046 (9)
  C12    0.0527 (13)   0.0770 (18)   0.091 (2)     −0.0086 (12)   −0.0177 (13)    0.0174 (15)
  C13    0.0596 (12)   0.0508 (12)   0.0706 (15)   −0.0270 (10)   −0.0316 (11)    0.0037 (10)
  C14    0.0434 (10)   0.0628 (13)   0.0514 (12)   −0.0186 (9)    −0.0118 (8)     −0.0057 (10)
  C15    0.0544 (13)   0.0790 (17)   0.0714 (17)   −0.0135 (12)   −0.0198 (12)    0.0090 (13)
  C16    0.0896 (19)   0.0617 (14)   0.0500 (13)   −0.0309 (13)   −0.0161 (12)    −0.0082 (11)
  C17    0.176 (5)     0.139 (4)     0.064 (2)     −0.071 (3)     0.028 (2)       −0.050 (2)
  C18    0.103 (5)     0.136 (8)     0.059 (4)     −0.038 (5)     0.005 (3)       −0.033 (4)
  C18A   0.135 (12)    0.115 (10)    0.071 (6)     −0.025 (9)     −0.014 (7)      −0.018 (6)
  ------ ------------- ------------- ------------- -------------- --------------- --------------

Geometric parameters (Å, °) {#tablewrapgeomlong}
===========================

  --------------------- -------------- ----------------------- --------------
  S1---C6               1.705 (2)      C9---H9A                0.9600
  S1---C1               1.741 (2)      C9---H9B                0.9600
  S2---C6               1.703 (2)      C9---H9C                0.9600
  S2---C5               1.736 (2)      C9A---H9A1              0.9600
  O1---C7               1.319 (3)      C9A---H9A2              0.9600
  O1---C8               1.455 (3)      C9A---H9A3              0.9600
  O2---C7               1.200 (3)      C10---H10A              0.9700
  O3---C11              1.331 (2)      C10---H10B              0.9700
  O3---C10              1.443 (3)      C11---C12               1.489 (3)
  O4---C11              1.183 (3)      C12---H12A              0.9600
  O5---C14              1.332 (2)      C12---H12B              0.9600
  O5---C13              1.444 (3)      C12---H12C              0.9600
  O6---C14              1.182 (3)      C13---H13A              0.9700
  O7---C16              1.320 (4)      C13---H13B              0.9700
  O7---C17              1.443 (4)      C14---C15               1.485 (3)
  O8---C16              1.203 (3)      C15---H15A              0.9600
  C1---C2               1.362 (3)      C15---H15B              0.9600
  C1---C7               1.471 (3)      C15---H15C              0.9600
  C2---C3               1.431 (3)      C17---C18               1.4972 (10)
  C2---C10              1.507 (3)      C17---C18A              1.4987 (10)
  C3---C6               1.393 (2)      C17---H17A              0.9700
  C3---C4               1.431 (3)      C17---H17B              0.9700
  C4---C5               1.369 (3)      C17---H17C              0.9700
  C4---C13              1.503 (3)      C17---H17D              0.9700
  C5---C16              1.469 (3)      C18---H18A              0.9600
  C8---C9A              1.4988 (10)    C18---H18B              0.9600
  C8---C9               1.4994 (10)    C18---H18C              0.9600
  C8---H8A              0.9700         C18A---H18D             0.9600
  C8---H8B              0.9700         C18A---H18E             0.9600
  C8---H8C              0.9700         C18A---H18F             0.9600
  C8---H8D              0.9700                                 
                                                               
  C6---S1---C1          90.24 (10)     C2---C10---H10A         110.7
  C6---S2---C5          89.62 (10)     O3---C10---H10B         110.7
  C7---O1---C8          115.4 (2)      C2---C10---H10B         110.7
  C11---O3---C10        117.10 (16)    H10A---C10---H10B       108.8
  C14---O5---C13        115.27 (17)    O4---C11---O3           123.4 (2)
  C16---O7---C17        112.2 (3)      O4---C11---C12          125.0 (2)
  C2---C1---C7          127.8 (2)      O3---C11---C12          111.5 (2)
  C2---C1---S1          113.60 (17)    C11---C12---H12A        109.5
  C7---C1---S1          118.60 (17)    C11---C12---H12B        109.5
  C1---C2---C3          111.29 (17)    H12A---C12---H12B       109.5
  C1---C2---C10         123.9 (2)      C11---C12---H12C        109.5
  C3---C2---C10         124.7 (2)      H12A---C12---H12C       109.5
  C6---C3---C4          111.15 (19)    H12B---C12---H12C       109.5
  C6---C3---C2          111.75 (18)    O5---C13---C4           106.55 (16)
  C4---C3---C2          137.07 (18)    O5---C13---H13A         110.4
  C5---C4---C3          110.97 (17)    C4---C13---H13A         110.4
  C5---C4---C13         124.0 (2)      O5---C13---H13B         110.4
  C3---C4---C13         125.0 (2)      C4---C13---H13B         110.4
  C4---C5---C16         126.5 (2)      H13A---C13---H13B       108.6
  C4---C5---S2          114.14 (16)    O6---C14---O5           122.2 (2)
  C16---C5---S2         119.35 (19)    O6---C14---C15          125.9 (2)
  C3---C6---S2          114.09 (15)    O5---C14---C15          111.9 (2)
  C3---C6---S1          113.12 (15)    C14---C15---H15A        109.5
  S2---C6---S1          132.76 (11)    C14---C15---H15B        109.5
  O2---C7---O1          122.8 (3)      H15A---C15---H15B       109.5
  O2---C7---C1          125.5 (3)      C14---C15---H15C        109.5
  O1---C7---C1          111.7 (2)      H15A---C15---H15C       109.5
  O1---C8---C9A         107.7 (3)      H15B---C15---H15C       109.5
  O1---C8---C9          108.9 (7)      O8---C16---O7           124.1 (3)
  O1---C8---H8A         109.9          O8---C16---C5           124.0 (3)
  C9A---C8---H8A        139.2          O7---C16---C5           111.9 (2)
  C9---C8---H8A         109.9          O7---C17---C18          108.9 (3)
  O1---C8---H8B         109.9          O7---C17---C18A         113.7 (5)
  C9A---C8---H8B        72.5           O7---C17---H17A         109.9
  C9---C8---H8B         109.9          C18---C17---H17A        109.9
  H8A---C8---H8B        108.3          C18A---C17---H17A       133.7
  O1---C8---H8C         110.2          O7---C17---H17B         109.9
  C9A---C8---H8C        111.5          C18---C17---H17B        109.9
  C9---C8---H8C         138.2          C18A---C17---H17B       70.5
  H8A---C8---H8C        69.4           H17A---C17---H17B       108.3
  O1---C8---H8D         109.8          O7---C17---H17C         107.6
  C9A---C8---H8D        109.2          C18---C17---H17C        138.3
  C9---C8---H8D         70.6           C18A---C17---H17C       105.0
  H8B---C8---H8D        137.3          H17A---C17---H17C       75.1
  H8C---C8---H8D        108.5          O7---C17---H17D         109.6
  C8---C9---H9A         109.5          C18---C17---H17D        78.0
  H8D---C9---H9A        131.3          C18A---C17---H17D       112.7
  C8---C9---H9B         109.5          H17B---C17---H17D       134.0
  H8D---C9---H9B        72.5           H17C---C17---H17D       107.8
  C8---C9---H9C         109.5          C17---C18---H18A        109.5
  H8D---C9---H9C        115.5          C17---C18---H18B        109.5
  C8---C9A---H9A1       109.5          C17---C18---H18C        109.5
  C8---C9A---H9A2       109.5          C17---C18A---H18D       109.5
  H9A1---C9A---H9A2     109.5          C17---C18A---H18E       109.5
  C8---C9A---H9A3       109.5          H18D---C18A---H18E      109.5
  H9A1---C9A---H9A3     109.5          C17---C18A---H18F       109.5
  H9A2---C9A---H9A3     109.5          H18D---C18A---H18F      109.5
  O3---C10---C2         105.38 (16)    H18E---C18A---H18F      109.5
  O3---C10---H10A       110.7                                  
                                                               
  C6---S1---C1---C2     −0.51 (18)     C1---S1---C6---S2       −176.94 (17)
  C6---S1---C1---C7     178.72 (19)    C8---O1---C7---O2       −1.0 (5)
  C7---C1---C2---C3     −178.9 (2)     C8---O1---C7---C1       −179.6 (3)
  S1---C1---C2---C3     0.2 (2)        C2---C1---C7---O2       −2.8 (4)
  C7---C1---C2---C10    −2.9 (4)       S1---C1---C7---O2       178.1 (2)
  S1---C1---C2---C10    176.25 (16)    C2---C1---C7---O1       175.8 (2)
  C1---C2---C3---C6     0.2 (3)        S1---C1---C7---O1       −3.3 (3)
  C10---C2---C3---C6    −175.73 (18)   C7---O1---C8---C9A      179.6 (6)
  C1---C2---C3---C4     177.8 (2)      C7---O1---C8---C9       136.4 (11)
  C10---C2---C3---C4    1.9 (4)        C11---O3---C10---C2     −159.1 (2)
  C6---C3---C4---C5     1.7 (2)        C1---C2---C10---O3      −92.8 (3)
  C2---C3---C4---C5     −175.9 (2)     C3---C2---C10---O3      82.6 (3)
  C6---C3---C4---C13    −178.15 (18)   C10---O3---C11---O4     1.0 (3)
  C2---C3---C4---C13    4.3 (4)        C10---O3---C11---C12    −178.8 (2)
  C3---C4---C5---C16    178.0 (2)      C14---O5---C13---C4     −172.7 (2)
  C13---C4---C5---C16   −2.2 (4)       C5---C4---C13---O5      91.0 (3)
  C3---C4---C5---S2     −1.9 (2)       C3---C4---C13---O5      −89.2 (3)
  C13---C4---C5---S2    177.97 (16)    C13---O5---C14---O6     −4.2 (4)
  C6---S2---C5---C4     1.19 (17)      C13---O5---C14---C15    175.7 (2)
  C6---S2---C5---C16    −178.7 (2)     C17---O7---C16---O8     2.0 (5)
  C4---C3---C6---S2     −0.8 (2)       C17---O7---C16---C5     −179.9 (3)
  C2---C3---C6---S2     177.42 (14)    C4---C5---C16---O8      −4.2 (4)
  C4---C3---C6---S1     −178.87 (14)   S2---C5---C16---O8      175.6 (2)
  C2---C3---C6---S1     −0.6 (2)       C4---C5---C16---O7      177.6 (2)
  C5---S2---C6---C3     −0.18 (16)     S2---C5---C16---O7      −2.5 (3)
  C5---S2---C6---S1     177.39 (17)    C16---O7---C17---C18    −179.8 (6)
  C1---S1---C6---C3     0.64 (16)      C16---O7---C17---C18A   −136.2 (10)
  --------------------- -------------- ----------------------- --------------

Hydrogen-bond geometry (Å, °) {#tablewraphbondslong}
=============================

  --------------------- --------- --------- ----------- ---------------
  *D*---H···*A*         *D*---H   H···*A*   *D*···*A*   *D*---H···*A*
  C10---H10A···O2       0.97      2.31      2.959 (4)   123
  C13---H13B···O8       0.97      2.32      2.891 (4)   117
  C17---H17C···O8       0.97      2.09      2.563 (5)   108
  C10---H10B···O6^i^    0.97      2.44      3.243 (3)   140
  C15---H15C···O2^ii^   0.96      2.56      3.453 (4)   154
  --------------------- --------- --------- ----------- ---------------

Symmetry codes: (i) −*x*+1, −*y*+1, −*z*+1; (ii) *x*, *y*, *z*+1.

###### Hydrogen-bond geometry (Å, °)

  *D*---H⋯*A*           *D*---H   H⋯*A*   *D*⋯*A*     *D*---H⋯*A*
  --------------------- --------- ------- ----------- -------------
  C10---H10*A*⋯O2       0.97      2.31    2.959 (4)   123
  C13---H13*B*⋯O8       0.97      2.32    2.891 (4)   117
  C17---H17*C*⋯O8       0.97      2.09    2.563 (5)   108
  C10---H10*B*⋯O6^i^    0.97      2.44    3.243 (3)   140
  C15---H15*C*⋯O2^ii^   0.96      2.56    3.453 (4)   154

Symmetry codes: (i) ; (ii) .
