CC(C)(C)OC(=O)C[C@@H]1C/C=C\C[C@H](CC(=O)N[C@@H](CO)Cc2ccccc2)C(=O)N[C@H](Cc2ccccc2)COC1=O
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?