C=CC[C@@H](CC(=O)OC(C)(C)C)C(=O)O[C@@H](CNC(=O)[C@H](CC=C)CC(=O)N(CCO)Cc1ccccc1)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?