C[C@@H](C(=O)NCc1ccc(S(C)(=O)=O)cc1)[C@H]1C[C@]1(C)[C@H](NC(=O)OCc1ccccc1)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?