N#CC(NNC(=O)c1c(Cl)c(Cl)c(Cl)c(Cl)c1-c1nc2cc(C(=O)c3ccccc3)ccc2[nH]1)c1ccccc1
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?