methyl 7-(2,3,5-trioxocyclopentyl)hept-5-enoate

Methyl (Z)-9-oxo-5-decenoate

2,4,6-三甲基苯磺酰氯

methyl (Z)-7-((3R)-3-hydroxy-2,5-dioxocyclopentyl)hept-5-enoate

methyl 7-[(3R)-3-[tert-butyl(dimethyl)silyl]oxy-5-oxocyclopenten-1-yl]hept-5-enoate