2-(4-Carboxybutyl)-2-cyclopentenon-oxim

1-methoximino-2-(6,6-dicarbethoxyhexyl)-2-cyclopentene

2-(4-carbethoxybutyl)cyclopentane-1-one

7-(5-methoxyiminocyclopenten-1-yl)heptanoic acid

乙基5-氧代-1-环戊烯-1-羧酸酯