Cl.O=C1N[C@@H]([C@H]2CC[C@H](Cl)CN2)C(=O)N[C@H]1[C@H]1CC[C@H](Cl)CN1
Hydrogen bond acceptor: The atom, ion, or molecule component of a hydrogen bond which does not supply the bridging (shared) hydrogen atom. How many hydrogen bond acceptors does the molecule have?