CSCC[C@H](NC(=O)[C@H]1CC[C@H](CNC(=O)[C@@H](N)Cc2ccccc2)CC1)C(=O)O.Cl
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?