145865-73-2 1H-Pyrazole-4-carboxylic acid, 3-((((4-methoxyphenyl)methylene)hydrazino)sulfonyl)-1-methyl-,ethyl ester Ethyl 3-((((4-methoxyphenyl)methylene)hydrazino)sulfonyl)-1-methyl-1H-pyrazole-4-carboxylate