4,6-二甲基邻吡喃酮

3-甲基戊-2-烯二酸二甲酯

2,6-二甲基苯甲酸甲酯

methyl 1,5-dimethyl-8-ethoxy-3-oxo-2-oxabicyclo[2.2.2]-oct-5-ene-6-carboxylate

methyl 4,6-dimethyl-2,3-dihydro-1H-indene-5-carboxylate