2,3,5-trimethylcyclopent-2-en-1-one

1,1,4,4-四甲基丁烷-1,4-二基二乙酸酯

3,6-dimethylthieno[3,2-b]thiophene

(2,5-dimethyl-3-oxohex-4-en-2-yl) acetate

1-methyl-1-[2-(1-methylcyclopropyl)ethynyl]cyclopropane