CN1C(=N\S(=O)(=O)c2ccc(Cl)cc2)/C(=N/N=P(c2ccccc2)(c2ccccc2)c2ccccc2)c2ccccc21
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?