CC(C)N(C(=O)[C@H]1CC(CC(=O)NCc2ccco2)C(=O)N2CCc3c([nH]c4ccccc34)[C@]12C)C(C)C
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?