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((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
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[(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
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[(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]-acetic acid ethyl ester
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(S)-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