Cc1ccc(S(=O)(=O)N/N=C(\c2nc3ccc([N+](=O)[O-])cc3nc2O)C(O)c2ccccc2Cl)cc1
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?