[(1R,3aR,4R,6aR)-1-(2-Hydroxy-ethyl)-2,2-dimethyl-5-oxo-4-phenylsulfanylmethyl-hexahydro-pentalen-3a-yl]-acetic acid methyl ester

(3aR*,4R*)-5,5-dimethyl-4-(2-tetrahydropyranyloxy)ethyl-3a,4,5,6-tetrahydro-2(3H)-pentalenone

methyl 5-(1,3-dioxolan-2-yl)-5-methyl-3-oxohexanoate

(2R*,3R*)-2-acetonyl-4,4-dimethyl-3-(2-tetrahydropyranyloxy)ethylcyclopentan-1-one

(2R*,3R*)-4,4-dimethyl-2-(2-methyl-1,3-dioxolan-2-yl)methyl-3-vinylcyclopentan-1-one

(6R*,7R*)-8,8-dimethyl-7-(2-hydroxyethyl)-6-(2-methyl-1,3-dioxolan-2-yl)methyl-1,4-dioxaspiro<4.4>nonane

(6R,7R)-8,8-Dimethyl-6-(2-methyl-[1,3]dioxolan-2-ylmethyl)-7-vinyl-1,4-dioxa-spiro[4.4]nonane

2-acetonyl-4,4-dimethylcyclopent-2-en-1-one

4,4-dimethyl-2-(2-methyl-1,3-dioxolan-2-yl)methylcyclopent-2-en-1-one

2-allyl-4,4-dimehtylcyclopent-2-en-1-one

(2R*,3R*)-2-acetonyl-4,4-dimethyl-3-(2-hydroxyethyl)cyclopentan-1-one

methyl (1R*,3aR*,4S*,6aR*)-2,2-dimethyl-2,3,3a,4,6,6a-hexahydro-5-oxo-4-phenylthiomethyl-1-(2-tetrahydropyranyloxy)ethyl-3a(1H)pentaleneacetate