7-甲基-1,4-二氧杂螺[4.5]癸-6-烯

甲醛

7-methyl-1,4-dithiaspiro[4.5]dec-6-ene

2-乙酰基-5-羰基-己酸乙基酯

1-(2-acetylcyclopropyl)ethanone