7-(2-Hydroxy-cyclopentyl)-heptanoic acid
methyl 7-(3-hydroxy-5-oxocyclopent-1-en-1-yl)heptanoate
2-(6-methoxycarbonylhexyl)cyclopent-2-en-1-one
2-(6-carboxyhexyl)cyclopentanone
2-(6-methoxycarbonylhexyl)-4-(tetrahydropyran-2-yloxy)cyclopent-2-enone