Cc1ccc(Cc2cnc(NC(=O)/C(C#N)=C/c3ccc(-c4cccc([N+](=O)[O-])c4)o3)s2)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?