CCOC(=O)[C@@H](C)N(C(=O)OC(C)(C)C)S(=O)(=O)N(Cc1ccccc1)[C@@H](C(=O)OC)C(C)C
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?