CO[C@@H]1COC(=O)[C@H](Cc2ccccc2)NC(=O)C/C=C\[C@@H](C)[C@H](OC)COC(=O)[C@@H](C)NC(=O)C/C=C\[C@H]1C
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?