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

For structures of other acrylate derivatives, see: Zhang *et al.* (2009[@bb14]); Wang *et al.* (2011[@bb13]); SakthiMurugesan *et al.* (2011[@bb10]); Govindan *et al.* (2011[@bb6]). For the use of oxime ligands in coordination chemistry, see: Chaudhuri (2003[@bb4]). For the biological activity of caffeic acids, see: Hwang *et al.* (2001[@bb7]); Altug *et al.* (2008[@bb1]); Ates *et al.* (2006[@bb2]); Atik *et al.* (2006[@bb3]); Padinchare *et al.* (2001[@bb9]).

Experimental   {#sec2}
==============

 {#sec2.1}

### Crystal data   {#sec2.1.1}

C~18~H~17~NO~4~*M* *~r~* = 311.33Monoclinic,*a* = 9.6463 (4) Å*b* = 7.7062 (3) Å*c* = 22.4675 (9) Åβ = 100.337 (2)°*V* = 1643.04 (11) Å^3^*Z* = 4Mo *K*α radiationμ = 0.09 mm^−1^*T* = 293 K0.2 × 0.2 × 0.2 mm

### Data collection   {#sec2.1.2}

Oxford Diffraction Xcalibur-S diffractometerAbsorption correction: multi-scan (*CrysAlis PRO*; Oxford Diffraction, 2009[@bb8]) *T* ~min~ = 0.980, *T* ~max~ = 0.99017182 measured reflections3692 independent reflections2537 reflections with *I* \> 2σ(*I*)*R* ~int~ = 0.029

### Refinement   {#sec2.1.3}

*R*\[*F* ^2^ \> 2σ(*F* ^2^)\] = 0.046*wR*(*F* ^2^) = 0.127*S* = 1.023692 reflections211 parametersH-atom parameters constrainedΔρ~max~ = 0.21 e Å^−3^Δρ~min~ = −0.18 e Å^−3^

 {#d5e476}

Data collection: *CrysAlis PRO* (Oxford Diffraction, 2009[@bb8]); cell refinement: *CrysAlis PRO*; data reduction: *CrysAlis PRO*; program(s) used to solve structure: *SHELXS97* (Sheldrick, 2008[@bb11]); program(s) used to refine structure: *SHELXL97* (Sheldrick, 2008[@bb11]); molecular graphics: *ORTEP-3 for Windows* (Farrugia, 1997[@bb5]); software used to prepare material for publication: *PLATON* (Spek, 2009[@bb12]).

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

Crystal structure: contains datablock(s) I, global. DOI: [10.1107/S1600536812002711/bt5745sup1.cif](http://dx.doi.org/10.1107/S1600536812002711/bt5745sup1.cif)

Structure factors: contains datablock(s) I. DOI: [10.1107/S1600536812002711/bt5745Isup2.hkl](http://dx.doi.org/10.1107/S1600536812002711/bt5745Isup2.hkl)

Supplementary material file. DOI: [10.1107/S1600536812002711/bt5745Isup3.cml](http://dx.doi.org/10.1107/S1600536812002711/bt5745Isup3.cml)

Additional supplementary materials: [crystallographic information](http://scripts.iucr.org/cgi-bin/sendsupfiles?bt5745&file=bt5745sup0.html&mime=text/html); [3D view](http://scripts.iucr.org/cgi-bin/sendcif?bt5745sup1&Qmime=cif); [checkCIF report](http://scripts.iucr.org/cgi-bin/paper?bt5745&checkcif=yes)

Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: [BT5745](http://scripts.iucr.org/cgi-bin/sendsup?bt5745)).

SA thanks the UGC, India, for financial support.

Comment
=======

Recently, 2-cyanoacrylates have been extensively used as agrochemicals because of their unique mechanism of action and good environmental profiles (Zhang *et al.*, 2009). Oximes are a classical type of chelating ligands which are widely used in coordination and analytical chemistry (Chaudhuri, 2003). Some naturally occurring caffeic acids and their esters attract much attention in biology and medicine (Hwang *et al.*, 2001; Altug *et al.*, 2008).These compounds show antiviral, antibacterial, vasoactive, antiatherogenic, antiproliferative, antioxidant and antiinflammatory properties (Atik *et al.*,2006; Padinchare *et al.*, 2001; Ates *et al.*, 2006). Against this background,and in order to obtain detailed information on molecular conformations in the solid state, an X-ray study of the title compound was carried out and the results are presented here. X-Ray analysis confirms the molecular structure and atom connectivity as illustrated in Fig. 1. The oxime group having the C=N forming an E configuration. The hydroxy ethanimine group is essentially coplanar with the ring to which it is attached \[C2---C1---N1---O1 torsion angle = 179.9°\]

The enoate group assumes an extended conformation as can be seen from torsion angles C12---C9---C10---O4 \[-178.7°\] and C9---C10---O4---C11 \[178.4°\]. The hydroxy ethanimine group in the molecules are linked into cyclic centrosymmetric dimers *via* O---H···N hydrogen bonds with the motif *R*~2~^2^(6)(Wang *et al.* (2011), Govindan *et al.* (2011), SakthiMurugesan *et al.* (2011)). Crystal packing is stabilized by C15---H15···O3 and O1---H1A···N1 type intermolecular hydrogen bonds and values are tabulated. The crystal packing (Fig.2) shows the presence of inter-molecular hydrogen bonding.

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

To a stirred solution of (*E*)-methyl 2-((2-formylphenoxy)methyl)-3-phenylacrylate (4 mmol) in 10 ml of EtOH/H~2~O mixture (1:1) was added NH~2~OH.HCl (6 mmol) in the presence of 50% NaOH at room temperature. Then the reaction mixture was allowed to stir at room temperature for 1.5 h. After completion of the reaction, solvent was removed and crude mass was diluted with water (15 ml) and extracted with ethyl acetate (3 × 15 ml). The combined organic layer was washed with brine (2 × 10 ml) and dried over anhydrous Na~2~SO~4~ and then evaporated under reduced pressure to obtain (*E*)-Methyl 2-((2-((*E*)-(hydroxyimino)methyl)phenoxy)methyl)-3-phenylacrylate as a colourless solid.

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

Hydrogen atoms were set to calculated positions and refined as riding on their parent atoms with O-H = 0.82Å and C-H ranging from 0.93Å to 0.97Å and U(H) set to 1.2 U~eq~(C) or 1.5 U~eq~(C~methyl~, O).

Figures
=======

![The molecular structure of the title compound, showing 30% probability displacement ellipsoids for H atoms. H atoms have been omitted for clarity.](e-68-0o608-fig1){#Fap1}

![A view of the crystal packing. H atoms not involved in hydrogen bonding (dashed lines) have been omitted for clarity.](e-68-0o608-fig2){#Fap2}

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

  ------------------------- ---------------------------------------
  C~18~H~17~NO~4~           *F*(000) = 656
  *M~r~* = 311.33           *D*~x~ = 1.259 Mg m^−3^
  Monoclinic, *P*2~1~/*n*   Mo *K*α radiation, λ = 0.71073 Å
  *a* = 9.6463 (4) Å        Cell parameters from 8725 reflections
  *b* = 7.7062 (3) Å        θ = 2.8--29.1°
  *c* = 22.4675 (9) Å       µ = 0.09 mm^−1^
  β = 100.337 (2)°          *T* = 293 K
  *V* = 1643.04 (11) Å^3^   Monoclinic, colourless
  *Z* = 4                   0.2 × 0.2 × 0.2 mm
  ------------------------- ---------------------------------------

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

  ------------------------------------------------------------------------------ --------------------------------------
  Oxford Diffraction Xcalibur-S diffractometer                                   3692 independent reflections
  Radiation source: fine-focus sealed tube                                       2537 reflections with *I* \> 2σ(*I*)
  Graphite monochromator                                                         *R*~int~ = 0.029
  Detector resolution: 15.9948 pixels mm^-1^                                     θ~max~ = 27.3°, θ~min~ = 2.2°
  ω scans                                                                        *h* = −12→12
  Absorption correction: multi-scan (*CrysAlis PRO*; Oxford Diffraction, 2009)   *k* = −9→9
  *T*~min~ = 0.980, *T*~max~ = 0.990                                             *l* = −18→29
  17182 measured reflections                                                     
  ------------------------------------------------------------------------------ --------------------------------------

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

  ---------------------------------------------------------------- ----------------------------------------------------------------------------------------------------
  Refinement on *F*^2^                                             Secondary atom site location: difference Fourier map
  Least-squares matrix: full                                       Hydrogen site location: inferred from neighbouring sites
  *R*\[*F*^2^ \> 2σ(*F*^2^)\] = 0.046                              H-atom parameters constrained
  *wR*(*F*^2^) = 0.127                                             *w* = 1/\[σ^2^(*F*~o~^2^) + (0.0557*P*)^2^ + 0.3308*P*\] where *P* = (*F*~o~^2^ + 2*F*~c~^2^)/3
  *S* = 1.02                                                       (Δ/σ)~max~ \< 0.001
  3692 reflections                                                 Δρ~max~ = 0.21 e Å^−3^
  211 parameters                                                   Δρ~min~ = −0.18 e Å^−3^
  0 restraints                                                     Extinction correction: *SHELXL97* (Sheldrick, 2008), Fc^\*^=kFc\[1+0.001xFc^2^λ^3^/sin(2θ)\]^-1/4^
  Primary atom site location: structure-invariant direct methods   Extinction coefficient: 0.0173 (18)
  ---------------------------------------------------------------- ----------------------------------------------------------------------------------------------------

Special details {#specialdetails}
===============

  -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  Geometry. All e.s.d.\'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.\'s are taken into account individually in the estimation of e.s.d.\'s in distances, angles and torsion angles; correlations between e.s.d.\'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.\'s is used for estimating e.s.d.\'s involving l.s. planes.
  Refinement. Refinement of *F*^2^ against ALL reflections. The weighted *R*-factor *wR* and goodness of fit *S* are based on *F*^2^, conventional *R*-factors *R* are based on *F*, with *F* set to zero for negative *F*^2^. The threshold expression of *F*^2^ \> σ(*F*^2^) is used only for calculating *R*-factors(gt) *etc*. and is not relevant to the choice of reflections for refinement. *R*-factors based on *F*^2^ are statistically about twice as large as those based on *F*, and *R*- factors based on ALL data will be even larger.
  -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

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

  ------ --------------- -------------- -------------- -------------------- --
         *x*             *y*            *z*            *U*~iso~\*/*U*~eq~   
  C1     0.00948 (17)    0.7108 (2)     0.07286 (7)    0.0513 (4)           
  H1     0.0818          0.7020         0.1062         0.062\*              
  C2     −0.09006 (15)   0.56814 (19)   0.05966 (6)    0.0444 (3)           
  C3     −0.20363 (17)   0.5708 (2)     0.01196 (7)    0.0583 (4)           
  H3     −0.2181         0.6677         −0.0130        0.070\*              
  C4     −0.29464 (18)   0.4335 (3)     0.00100 (8)    0.0667 (5)           
  H4     −0.3711         0.4384         −0.0307        0.080\*              
  C5     −0.27291 (18)   0.2889 (3)     0.03682 (8)    0.0626 (5)           
  H5     −0.3344         0.1953         0.0290         0.075\*              
  C6     −0.16062 (18)   0.2804 (2)     0.08442 (8)    0.0566 (4)           
  H6     −0.1459         0.1815         0.1084         0.068\*              
  C7     −0.07031 (15)   0.4206 (2)     0.09599 (6)    0.0449 (4)           
  C8     0.08136 (16)    0.2771 (2)     0.17851 (7)    0.0489 (4)           
  H8A    0.1178          0.1890         0.1546         0.059\*              
  H8B    0.0014          0.2294         0.1937         0.059\*              
  C9     0.19303 (15)    0.33459 (19)   0.22971 (7)    0.0447 (4)           
  C10    0.34042 (17)    0.3505 (2)     0.21965 (8)    0.0532 (4)           
  C11    0.4897 (2)      0.3269 (3)     0.14769 (11)   0.0870 (7)           
  H11A   0.5201          0.4455         0.1522         0.130\*              
  H11B   0.4865          0.2909         0.1066         0.130\*              
  H11C   0.5546          0.2546         0.1741         0.130\*              
  C12    0.16887 (15)    0.37404 (19)   0.28457 (7)    0.0460 (4)           
  H12    0.2478          0.4040         0.3129         0.055\*              
  C13    0.03513 (16)    0.3767 (2)     0.30627 (7)    0.0503 (4)           
  C14    −0.09178 (17)   0.4264 (3)     0.27074 (9)    0.0672 (5)           
  H14    −0.0935         0.4638         0.2313         0.081\*              
  C15    −0.2148 (2)     0.4205 (3)     0.29358 (13)   0.0915 (8)           
  H15    −0.2995         0.4531         0.2695         0.110\*              
  C16    −0.2125 (3)     0.3667 (3)     0.35192 (16)   0.1059 (9)           
  H16    −0.2963         0.3582         0.3668         0.127\*              
  C17    −0.0873 (3)     0.3256 (3)     0.38844 (14)   0.1111 (9)           
  H17    −0.0856         0.2931         0.4284         0.133\*              
  C18    0.0351 (2)      0.3325 (3)     0.36579 (10)   0.0784 (6)           
  H18    0.1201          0.3070         0.3910         0.094\*              
  N1     0.00127 (14)    0.84521 (17)   0.04087 (6)    0.0510 (3)           
  O1     0.10817 (14)    0.96479 (16)   0.06224 (6)    0.0694 (4)           
  H1A    0.1018          1.0483         0.0393         0.104\*              
  O2     0.04067 (12)    0.42920 (14)   0.14275 (5)    0.0603 (3)           
  O3     0.43880 (12)    0.3942 (2)     0.25704 (7)    0.0802 (4)           
  O4     0.35180 (13)    0.31127 (18)   0.16290 (6)    0.0711 (4)           
  ------ --------------- -------------- -------------- -------------------- --

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

  ----- ------------- ------------- ------------- -------------- ------------- --------------
        *U*^11^       *U*^22^       *U*^33^       *U*^12^        *U*^13^       *U*^23^
  C1    0.0566 (9)    0.0505 (9)    0.0424 (8)    −0.0007 (7)    −0.0024 (7)   0.0057 (7)
  C2    0.0450 (8)    0.0486 (8)    0.0387 (7)    0.0017 (6)     0.0054 (6)    −0.0016 (6)
  C3    0.0599 (10)   0.0615 (10)   0.0477 (9)    0.0048 (8)     −0.0056 (7)   0.0005 (8)
  C4    0.0548 (10)   0.0810 (13)   0.0565 (10)   −0.0004 (9)    −0.0112 (8)   −0.0104 (9)
  C5    0.0542 (10)   0.0704 (11)   0.0611 (11)   −0.0158 (8)    0.0046 (8)    −0.0129 (9)
  C6    0.0598 (10)   0.0564 (10)   0.0524 (9)    −0.0108 (8)    0.0066 (8)    0.0012 (8)
  C7    0.0429 (7)    0.0521 (9)    0.0388 (7)    −0.0026 (6)    0.0044 (6)    −0.0012 (6)
  C8    0.0527 (9)    0.0446 (8)    0.0472 (8)    0.0008 (7)     0.0028 (7)    0.0060 (7)
  C9    0.0425 (8)    0.0404 (8)    0.0496 (9)    0.0035 (6)     0.0038 (6)    0.0074 (6)
  C10   0.0487 (9)    0.0499 (9)    0.0610 (10)   0.0058 (7)     0.0096 (8)    0.0053 (8)
  C11   0.0764 (13)   0.0988 (16)   0.0972 (16)   0.0140 (12)    0.0463 (12)   0.0203 (13)
  C12   0.0402 (7)    0.0468 (8)    0.0478 (8)    0.0013 (6)     −0.0009 (6)   0.0050 (7)
  C13   0.0474 (8)    0.0473 (9)    0.0556 (9)    −0.0004 (7)    0.0074 (7)    0.0001 (7)
  C14   0.0465 (9)    0.0818 (13)   0.0711 (12)   0.0038 (9)     0.0042 (8)    −0.0141 (10)
  C15   0.0447 (10)   0.0960 (17)   0.134 (2)     −0.0010 (10)   0.0160 (12)   −0.0333 (16)
  C16   0.0896 (18)   0.0783 (16)   0.172 (3)     −0.0038 (13)   0.0828 (19)   −0.0029 (17)
  C17   0.123 (2)     0.1042 (19)   0.128 (2)     0.0311 (17)    0.0813 (19)   0.0423 (17)
  C18   0.0792 (13)   0.0869 (14)   0.0748 (13)   0.0201 (11)    0.0293 (11)   0.0233 (11)
  N1    0.0582 (8)    0.0473 (8)    0.0453 (7)    −0.0023 (6)    0.0031 (6)    0.0017 (6)
  O1    0.0836 (9)    0.0544 (7)    0.0620 (8)    −0.0171 (6)    −0.0088 (6)   0.0092 (6)
  O2    0.0628 (7)    0.0523 (7)    0.0563 (7)    −0.0121 (5)    −0.0151 (5)   0.0150 (5)
  O3    0.0425 (7)    0.1103 (11)   0.0870 (9)    −0.0043 (7)    0.0093 (6)    −0.0138 (8)
  O4    0.0638 (8)    0.0893 (9)    0.0651 (8)    0.0080 (7)     0.0243 (6)    0.0060 (7)
  ----- ------------- ------------- ------------- -------------- ------------- --------------

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

  --------------------- -------------- ----------------------- --------------
  C1---N1               1.2553 (19)    C10---O4                1.334 (2)
  C1---C2               1.455 (2)      C11---O4                1.437 (2)
  C1---H1               0.9300         C11---H11A              0.9600
  C2---C3               1.388 (2)      C11---H11B              0.9600
  C2---C7               1.393 (2)      C11---H11C              0.9600
  C3---C4               1.369 (2)      C12---C13               1.459 (2)
  C3---H3               0.9300         C12---H12               0.9300
  C4---C5               1.369 (3)      C13---C18               1.380 (2)
  C4---H4               0.9300         C13---C14               1.390 (2)
  C5---C6               1.380 (2)      C14---C15               1.376 (3)
  C5---H5               0.9300         C14---H14               0.9300
  C6---C7               1.383 (2)      C15---C16               1.371 (4)
  C6---H6               0.9300         C15---H15               0.9300
  C7---O2               1.3604 (17)    C16---C17               1.370 (4)
  C8---O2               1.4356 (17)    C16---H16               0.9300
  C8---C9               1.495 (2)      C17---C18               1.368 (3)
  C8---H8A              0.9700         C17---H17               0.9300
  C8---H8B              0.9700         C18---H18               0.9300
  C9---C12              1.330 (2)      N1---O1                 1.4019 (17)
  C9---C10              1.484 (2)      O1---H1A                0.8200
  C10---O3              1.1976 (19)                            
                                                               
  N1---C1---C2          122.37 (14)    O4---C10---C9           111.86 (14)
  N1---C1---H1          118.8          O4---C11---H11A         109.5
  C2---C1---H1          118.8          O4---C11---H11B         109.5
  C3---C2---C7          118.05 (14)    H11A---C11---H11B       109.5
  C3---C2---C1          123.16 (14)    O4---C11---H11C         109.5
  C7---C2---C1          118.78 (12)    H11A---C11---H11C       109.5
  C4---C3---C2          121.30 (16)    H11B---C11---H11C       109.5
  C4---C3---H3          119.4          C9---C12---C13          128.71 (14)
  C2---C3---H3          119.4          C9---C12---H12          115.6
  C5---C4---C3          119.87 (15)    C13---C12---H12         115.6
  C5---C4---H4          120.1          C18---C13---C14         118.13 (17)
  C3---C4---H4          120.1          C18---C13---C12         118.30 (15)
  C4---C5---C6          120.67 (16)    C14---C13---C12         123.54 (15)
  C4---C5---H5          119.7          C15---C14---C13         120.4 (2)
  C6---C5---H5          119.7          C15---C14---H14         119.8
  C5---C6---C7          119.28 (16)    C13---C14---H14         119.8
  C5---C6---H6          120.4          C16---C15---C14         119.9 (2)
  C7---C6---H6          120.4          C16---C15---H15         120.0
  O2---C7---C6          124.41 (14)    C14---C15---H15         120.0
  O2---C7---C2          114.76 (13)    C17---C16---C15         120.3 (2)
  C6---C7---C2          120.82 (13)    C17---C16---H16         119.9
  O2---C8---C9          105.98 (12)    C15---C16---H16         119.9
  O2---C8---H8A         110.5          C18---C17---C16         119.7 (2)
  C9---C8---H8A         110.5          C18---C17---H17         120.2
  O2---C8---H8B         110.5          C16---C17---H17         120.2
  C9---C8---H8B         110.5          C17---C18---C13         121.3 (2)
  H8A---C8---H8B        108.7          C17---C18---H18         119.3
  C12---C9---C10        117.02 (14)    C13---C18---H18         119.3
  C12---C9---C8         123.97 (14)    C1---N1---O1            112.30 (12)
  C10---C9---C8         119.01 (14)    N1---O1---H1A           109.5
  O3---C10---O4         122.93 (16)    C7---O2---C8            119.38 (12)
  O3---C10---C9         125.20 (16)    C10---O4---C11          116.56 (16)
                                                               
  N1---C1---C2---C3     −1.8 (3)       C10---C9---C12---C13    177.38 (14)
  N1---C1---C2---C7     177.49 (15)    C8---C9---C12---C13     −2.3 (2)
  C7---C2---C3---C4     0.5 (2)        C9---C12---C13---C18    146.92 (19)
  C1---C2---C3---C4     179.80 (17)    C9---C12---C13---C14    −35.1 (3)
  C2---C3---C4---C5     −1.1 (3)       C18---C13---C14---C15   −4.1 (3)
  C3---C4---C5---C6     0.6 (3)        C12---C13---C14---C15   177.96 (17)
  C4---C5---C6---C7     0.5 (3)        C13---C14---C15---C16   0.5 (3)
  C5---C6---C7---O2     177.67 (16)    C14---C15---C16---C17   2.7 (4)
  C5---C6---C7---C2     −1.1 (3)       C15---C16---C17---C18   −2.3 (4)
  C3---C2---C7---O2     −178.30 (14)   C16---C17---C18---C13   −1.4 (4)
  C1---C2---C7---O2     2.4 (2)        C14---C13---C18---C17   4.6 (3)
  C3---C2---C7---C6     0.6 (2)        C12---C13---C18---C17   −177.4 (2)
  C1---C2---C7---C6     −178.70 (15)   C2---C1---N1---O1       179.94 (14)
  O2---C8---C9---C12    97.38 (17)     C6---C7---O2---C8       8.8 (2)
  O2---C8---C9---C10    −82.28 (16)    C2---C7---O2---C8       −172.33 (14)
  C12---C9---C10---O3   0.7 (2)        C9---C8---O2---C7       −173.35 (13)
  C8---C9---C10---O3    −179.59 (16)   O3---C10---O4---C11     −1.1 (3)
  C12---C9---C10---O4   −178.71 (14)   C9---C10---O4---C11     178.38 (15)
  C8---C9---C10---O4    1.0 (2)                                
  --------------------- -------------- ----------------------- --------------

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

  -------------------- --------- --------- ------------- ---------------
  *D*---H···*A*        *D*---H   H···*A*   *D*···*A*     *D*---H···*A*
  O1---H1*A*···N1^i^   0.82      2.06      2.7836 (19)   146
  C15---H15···O3^ii^   0.93      2.53      3.300 (2)     140
  -------------------- --------- --------- ------------- ---------------

Symmetry codes: (i) −*x*, −*y*+2, −*z*; (ii) *x*−1, *y*, *z*.

###### Hydrogen-bond geometry (Å, °)

  *D*---H⋯*A*        *D*---H   H⋯*A*   *D*⋯*A*       *D*---H⋯*A*
  ------------------ --------- ------- ------------- -------------
  O1---H1*A*⋯N1^i^   0.82      2.06    2.7836 (19)   146
  C15---H15⋯O3^ii^   0.93      2.53    3.300 (2)     140

Symmetry codes: (i) ; (ii) .
