  The pentaquark states, $P_{c}(4312)$, $P_{c}(4440)$ and $P_{c}(4450)$, can be
nicely arranged into a multiplet of seven molecules of
$\bar{D}^{(\ast)}\Sigma_{c}^{(\ast)}$ dictated by heavy quark spin symmetry,
while the $\Xi_{cc}^{(\ast)}\Sigma_{c}^{(\ast)}$ system can be related to the
$\bar{D}^{(\ast)}\Sigma_{c}^{(\ast)}$ system via heavy antiquark diquark
symmetry. In this work we employ the one boson exchange model to study the
interactions between $\Xi_{cc}^{(\ast)}$ and $\Sigma_{c}^{(\ast)}$ with
constraints from the pentaquark system. We show that a multiplet of ten triply
charmed dibaryons emerge naturally in the isospin-1/2 sector, while only three
appear in the isospin-3/2 sector. In addition, we study their heavy quark
flavor partners. Ten triply bottom diybaryons are found in the isospin-1/2
sector, while only nine are likely in the isospin-3/2 sector. Furthermore, the
predicted mass splitting between the $0^{+}$ $\Xi_{cc}\Sigma_{c}$ state and its
$1^{+}$ counterpart is found to be consistent with the correlation implied by
heavy antiquark diquark symmetry recently pointed out in Pan $et$ $al$..
