(E)-3-((Dimethoxyphosphinyl)thio)-2-butenoic acid methyl ester 19750-76-6 2-BUTENOIC ACID, 3-((DIMETHOXYPHOSPHINYL)THIO)-, METHYL ESTER, (E)- BRN 2372392 Crotonic acid, 3-mercapto-, methyl ester, S-ester with O,O-dimethyl phosphorothioate, (E)- trans-Thionophosdrin