O=C(CNC(=O)c1[nH]cnc1C(=O)N[C@@H](Cc1ccccc1)C(=O)OCc1ccccc1)OCc1ccccc1
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?