C=CC[C@H](CC(=O)NCCO)C(=O)NC[C@@H](OC(=O)[C@H](CC=C)CC(=O)OC(C)(C)C)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?