C/C(=N/NC(=S)Nc1ccc([N+](=O)[O-])cc1)c1cccc(/C(C)=N\NC(=S)Nc2ccc([N+](=O)[O-])cc2)n1
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?