COc1ccc(-c2nn(-c3ccccc3)cc2/C=N/Nc2ccc(S(N)(=O)=O)cc2[N+](=O)[O-])cc1OC
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?