168423-06-1 2-(2-Hydroxy-3-methyl-4-oxo-1(4H)-naphthalenylidene)hydrazinecarboxamide 2-Hmnqs 2-Hydroxy-3-methyl-1,4-naphthoquinone monosemicarbazone Hydrazinecarboxamide, 2-(2-hydroxy-3-methyl-4-oxo-1(4H)-naphthalenylidene)-