[(1R,2R,4aS,8aS)-5-(tert-Butyl-diphenyl-silanyloxymethyl)-1,2,4a-trimethyl-1,2,3,4,4a,7,8,8a-octahydro-naphthalen-1-yl]-acetaldehyde

(4aS)-1,4aβ-dimethyl-4,4a,7,8-tetrahydronaphthalene-2,5(3H,6H)-dione-5-ethyeneacetal

((1R,2R,4aS,8aS)-5-Formyl-1,2,4a-trimethyl-1,2,3,4,4a,7,8,8a-octahydro-naphthalen-1-yl)-acetic acid ethyl ester

(R)-1-(tert-Butyl-diphenyl-silanyloxy)-5-[(1R,2R,4aS,8aS)-5-(tert-butyl-diphenyl-silanyloxymethyl)-1,2,4a-trimethyl-1,2,3,4,4a,7,8,8a-octahydro-naphthalen-1-yl]-4-hydroxy-3-methylene-pentan-2-one