N=C(N)NS(=O)(=O)c1ccc(NC(=O)c2cccc3c(NNc4ccc(S(N)(=O)=O)cc4)c4ccccc4nc23)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?