(3aR,4S,6aS)-4-Vinyl-hexahydro-cyclopenta[c]furan-1-one

(3S,4aS,7aR)-3-Methoxy-7-methyl-1,3,4,4a,5,7a-hexahydro-cyclopenta[c]pyran

(4aS,7S,7aR)-7-Hydroxymethyl-hexahydro-cyclopenta[c]pyran-3-one

(1S,2R,3S)-1,2-bis[(phenylmethoxy)methyl]-3-vinyl-cyclopentane

(3aS,6S,6aR)-3-Oxo-6-vinyl-tetrahydro-cyclopenta[c]furan-3a-carboxylic acid methyl ester