吡喃-4-酮

3,3-dimethyl-1,5,9-trioxaspiro[5.5]undec-7-ene

甲醛

trans-1-ethoxy-3-[(trimethylsilyl)oxy]-buta-1,3-diene

1-甲氧基-3-(三甲基硅氧基)-丁二烯