methyl 2-oxo-1-(3-oxobutyl)cycloheptane-1-carboxylate

3甲基-6-(1-甲基乙基)-2-环己烯-1-酮

diethyl 2-(3-oxobutyl)-2-propan-2-ylpropanedioate

4,4a,5,6,7,8-六氢-3H-萘-2-酮

4,5,6,7,8,8a,9,10-octahydro-3H-phenanthren-2-one