CCN(CC)C(=O)[C@H]1C[C@H](CC(=O)NC(C)(C)C)C(=O)N2CCc3c([nH]c4ccc(Cl)cc34)[C@]12C
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?