ethyl (1R)-2-oxo-1-(3-oxobutyl)cyclohexane-1-carboxylate

丁烯酮

2-环己酮甲酸乙酯

ethyl 4-(2',2'-dimethyl-1'-oxopropyloxy)-1-(3'-iodopropyl)-2-methylenecyclohex-3-ene-1-carboxylate

methyl 1-(3-methylbut-2-enyl)-2-oxocyclopentanecarboxylate