C[C@H](O)[C@@H]1C(=O)N2CCc3ccc(-c4ccccc4)cc3[C@@H]2C[C@@H]1N(C)C(=O)NC1CCCCC1
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?