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(2007/10/02)methyl 7-<5-oxo-4-(tetrahydropyran-2-yloxy)cyclopent-1-enyl>heptanoate
(+/-)-7-(1,2-epoxy-5-oxocyclopentyl)-heptanoic acid
methyl 7-(4-acetoxy-5-oxocyclopent-1-enyl)heptanoate
7-(4-acetoxy-5-oxocyclopent-1-enyl)heptanoic acid
methyl 7-(4-hydroxy-5-oxocyclopent-1-enyl)heptanoate