2-carboxyethoxy-2-(6'-methoxycarbonylhexyl)-cyclopentanone

2-(6'-methoxycarbonylhexyl)-4-bromocyclopent-2-enone

2-氧代环戊羧酸乙酯

methyl 7-(1-bromo-2-oxocyclopentyl)heptanoate

1-acetoxy-2-(6'-methoxycarbonylhexyl)-cyclopentene