cyano-(1-cyano-3-methyl-cyclopentyl)-acetic acid ethyl ester

5-methyl-1,4,5,6-tetrahydro-cyclopentapyrazole-3-carboxylic acid ethyl ester

6-(4-chlorophenyl)-2-(2-(3-methylcyclopentylidene)hydrazinyl)pyrimidin-4(3H)-one

4-methyl-2-pentyl-cyclopentanone