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(1R,3S,5S,7R,9R,13R,15S,18S)-7-hydroxy-3-methoxy-18-methyl-13-((E)-4-methylpent-1-enyl)-12,19,20-trioxatricyclo[13.3.1.15,9]icosan-11-one
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(3R,4R,8S,9S,10R,11S,12S)-1-t-butyldimethylsiloxy-11,13-dihydroxy-3,9-dimethoxy-4,8,10,12-tetramethyltridecane-5-one