C=CC[C@@H](CC(=O)NCCO)C(=O)N[C@H](COC(=O)[C@@H](CC=C)Cc1ccc(F)cc1)Cc1c[nH]c2ccccc12
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?