4,4-dimethoxy-3-methylbut-2-en-1-ol

methyl (E)-3-formylcrotonate

methyl 4,4-dimethoxy-3-methyl-2-butenoate

3-甲酰基-2-丁烯酸乙酯

(E)-4,4-Dimethoxy-3-methyl-crotonsaeureaethylester