114642-67-0 2-BUTENEDIOIC ACID, (E)-, MONOMETHYL ESTER, 2-((4-(AMINOSULFONYL)PHENYL)SULFONYL 2-Butenedioic acid, (E)-, monomethyl ester, 2-((4-(aminosulfonyl)phenyl)sulfonyl)hydrazide Monomethyl (E)-2-butenedioate 2-((4-(aminosulfonyl)phenyl)sulfonyl)hydrazide