3-甲酰基-2-丁烯酸乙酯

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

(Z)-4-Hydroxy-2-methyl-2-butenal-dimethylacetal

ethyl 4-hydroxy-3-methylbut-2-enoate

(S)-(-)-ethyl 4-hydroxy-3-methylbutenoate