4-甲基-2(H)-呋喃酮

methyl 4-chloro-3-methylbut-3-enoate

(Z)-4-Formyloxy-3-methyl-but-3-enoic acid methyl ester

methyl (E)-4-(formyloxy)-3-methylbut-3-enoate

3-(2,2-Dichloro-vinyl)-2,2-dimethyl-cyclopropanecarboxylic acid (E)-3-methoxycarbonyl-2-methyl-propenyl ester