2-(4-carbethoxybutyl)cyclopent-2-en-1-one

acetic acid,[2-(5-hydroxypentyl)cyclopenten-1-yl] acetate

1-acetoxy-5-(carbomethoxy)-5-(6-carbethoxyhexyl)-1-cyclopentene

2-氧代环戊烷羧酸甲酯

壬二酸氢甲酯