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  • (1S,2S,4R,5R,6R,7R,8R,9S,12R,13S,15S,17R)-9-((2S,3S)-3-(benzyloxy)butan-2-yl)-5,7-dihydroxy-15-mesityl-2,6,8,12,17-pentamethyl-10,14,16-trioxaspiro[bicyclo[11.3.1]heptadecane-4,2'-oxiran]-11-one

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