1,1-二甲氧基丙烷

2-(1-ethoxypropyl)-2-((trimethylsilyl)oxy)cyclobutan-1-one

2-戊酮

(3-ethyl-2,4,5-trioxo-cyclopentyl)-glyoxylic acid ethyl ester

3-乙基-1,2,4-环戊烷三酮