2-[5-(5-methoxyiminocyclopenten-1-yl)pentyl]propanedioic acid

2-(5-Hydroxy-pentyl)-cyclopent-2-enone O-methyl-oxime

1-methoximino-2-(5-acetoxypentyl)-2-cyclopentene

2-(4-carboxybutyl)cyclopentan-1-one

2-(6-carbethoxyhexyl)-2-carbomethoxycyclopentanone