63745-97-1 Propanoic acid, 3-((2-chloro-5-nitrophenyl)amino)-3-((2,4,6-trichlorophenyl)hydrazono)-, ethyl ester Propanoic acid, 3-((2-chloro-5-nitrophenyl)imino)-3-((2,4,6-trichlorophenyl)hydrazono)-, ethyl ester