(4R,4aS,6S,7S,7aR)-2,4,7-trimethyl-octahydro-1H-cyclopenta[c]pyridin-6-ol

(4R,4aS,6S,7S,7aR)-4,7-Dimethyl-2-(toluene-4-sulfonyl)-octahydro-[2]pyrindin-6-ol

(4R,4aS,7S,7aR)-4,7-Dimethyl-2-(toluene-4-sulfonyl)-octahydro-[2]pyrindin-6-one

N-(2-Iodo-allyl)-4-methyl-N-((1R,5S)-5-methyl-4-oxo-cyclopent-2-enylmethyl)-benzenesulfonamide

(4aR,6S,7S,7aR)-6-{[tert-butyl(dimethyl)silyl]oxy}-7-methyl-4-methylene-octahydro-1H-cyclopenta[c]pyridine

(4aR,7S,7aS)-7-methyl-4-methylene-2-[(4-methylphenyl)sulfonyl]octahydro-6H-cyclopenta[c]pyridin-6-one

(4aR,6S,7S,7aR)-6-{[tert-butyl(dimethyl)silyl]oxy}-7-methyl-4-methylene-2-[(4-methylphenyl)sulfonyl]octahydro-1H-cyclopenta[c]pyridine