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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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(1R,3S,5R,7R,9R,13R,15S,18S)-7-(tert-Butyl-dimethyl-silanyloxy)-3-methoxy-18-methyl-13-((E)-4-methyl-pent-1-enyl)-12,19,20-trioxa-tricyclo[13.3.1.15,9]icosan-11-one
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