6-(2,2,3-三甲基环戊-3-烯-1-基)己-4-烯-3-酮

5-hydroxy-6-(2,2,3-trimethyl-3-cyclopenten-1-yl)hexan-3-one

4-hydroxy-3-methyl-5-(2,2,3-trimethyl-3-cyclopenten-1-yl)pentan-2-one

2-(2-oxobutyl)cyclopentan-1-one

2-(1-methyl-2-oxopropyl)-1-cyclopentanone