2,6,6-三甲基-4-氧代环己-2-烯-1-羧酸乙酯

ethyl 4,6,6-trimethyl-2-oxocyclohex-3-ene-1-carboxylate

异丙叉丙酮

乙酰乙酸乙酯

ethyl 7,9,9-trimethyl-1,4-dithiospiro[4.5]dec-6-ene-8-carboxylate