methyl 2-hydroxycycloheptene-1-carboxylate

methyl 5-hydroxy-2-oxocyclohexane-1-carboxylate

(4'aR,5'R,8'aR)-3',4',6',7',8',8'alpha-六氢-8'alpha-甲基-6'-氧代-螺[1,3-二氧戊环-2,1'(2'H)-萘]-5'-羧酸甲酯

4-ethyl-4-hydroxyhexan-3-one

2,2-二甲基-6-氧代环己烷羧酸甲酯