CCN(CC)C(=O)[C@H]1CC(CC(=O)NCCC2=CCCCC2)C(=O)N2CCc3c([nH]c4ccccc34)[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?