C[C@H](O)[C@@H]1CN2CCc3c([nH]c4ccccc34)[C@@H]2C[C@@H]1N(C)C(=O)Nc1cc(Cl)cc(Cl)c1
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?