CN(C)C(=O)[C@]1(C)C[C@H]1[C@H](NC(=O)CNC(=O)[C@@H]1CCCN1C(=O)[C@]1(C)C[C@H]1[C@H](NC(=O)OCc1ccccc1)c1ccccc1)c1ccccc1
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?