COc1ccc(/C=C/C(=N\NC(=O)c2ccccc2)c2sc(Nc3ccc([N+](=O)[O-])cc3)nc2C)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?