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

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