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  • (1S,2E,4E,8R,9S,10E,12E,15R,16S,20S)-8-((2R,3R,4S)-3-((tert-butyldimethylsilyl)oxy)-4-methyl-5-oxohexan-2-yl)-9-methoxy-1,3,13-trimethyl-16-pentyl-20-((triethylsilyl)oxy)-7,17,19-trioxabicyclo[13.4.1]icosa-2,4,10,12-tetraen-6-one

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