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(1R,2S,5R,6S,7S,8S,9S)-2,6-Dibenzyloxy-5-(tert-butyldimethylsiloxy)-7,9-(isopropylidenedioxy)-4,4,8-trimethyl-12-methylenebicyclo[6.4.0]dodecan-3-one
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(1S,2S,3R,4R,6S,7S,8R,12S)-3,7-Dibenzyloxy-6-(3-butenyl)-6-(tert-butyldimethylsiloxy)-2,12-(isopropylidenedioxy)-1,5,5-trimethyl-9-methylenebicyclo[6.4.0]dodecan-4-ol
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(1S,2S,3S,4R,6S,7S,8R,12S)-3,7-Dibenzyloxy-6-(3-butenyl)-4,6-(tert-butylmethylsilylenedioxy)-2,12-(isopropylidenedioxy)-1,5,5-trimethyl-9-methylenebicyclo[6.4.0]dodecane
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(4S,4aS,5S,6S,7R,8R,11S,12S,12aR)-6,12-Dibenzyloxy-11-(tert-butyldimethylsiloxy)-4,5-(isopropylidenedioxy)-4a,8,13,13-tetramethyl-1-methylenetetradecahydro-7,11-methanobenzocyclodecene-7,8-diol