2-Butenethioic acid, 3-methyl-, S-(1-methylpropyl) ester 3-Methylthiocrotonic acid, S-sec-butyl ester 34322-09-3 EINECS 251-938-4 S-(1-Methylpropyl) 3-methylbut-2-enethioate S-sec-Butyl 3-methyl-2-butenethioate sec-Butyl 3-methyl-2-butenethioate sec-Butyl S-senecthioate sec-Butyl-3-methylbut-2-ene thioate