4-methyl-1-<<(2-methyl-1-cyclopentenyl)methoxy>methylene>cyclohex-3-ene
1-(hydroxymethyl)-4-methyl-1-(1-methyl-2-methylenecyclopentyl)-3-cyclohexene
ethyl 2-methyl-1-cyclopentenecarboxylate
(4-Methyl-cyclohex-3-enylidene)-triphenyl-λ5-phosphane
tert-butyldimethylsilyl 4-methyl-1-(1-methyl-2-methylenecyclopentyl)-3-cyclohexene-1-carboxylate