2-(6-Carboxyhexyl)cyclopentanone 2-Ketocyclopentane-1-heptanoic acid 2-Oxocyclopentaneheptanoic acid 5288-67-5 7-(2-Oxocyclopentyl)heptanoic acid BRN 2212084 Cyclopentane-2-oxo-1-heptanoic acid Cyclopentaneheptanoic acid, 2-oxo- NSC 151785