26672-76-4 Benzenaminium, 4-(1-((aminothioxomethyl)hydrazono)octyl)-N-ethyl-N,N-dimethyl- M&B 15,944 M&B 15944 M&B-15,944 M&B-15944 p-Dimethylaminophenyl heptyl ketone thiosemicarbazone ethiodide