ethyl 2-[1-(2,3-dimethoxy-5-methylphenyl)-2,2-dimethylcyclopent-1-yl]acetate

ethyl 3-vinyl-3-(2,3-dimethoxy-5-methylphenyl)-4,4-dimethylhept-6-enoate

2,2-二甲基-4-戊烯醛

1-bromo-2,3-dimethoxy-5-methylbenzene

3-溴-4,5-二甲氧基苯甲醛