114642-65-8 2-BUTENEDIOIC ACID, (E)-, MONOMETHYL ESTER, 2-((4-METHOXYPHENYL)SULFONYL)HYDRAZI 2-Butenedioic acid, (E)-, monomethyl ester, 2-((4-methoxyphenyl)sulfonyl)hydrazide Monomethyl (E)-2-butenedioate 2-((4-methoxyphenyl)sulfonyl)hydrazide