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[(1R,2S,4S,5S,6S,10R,13S,14R,18S,19R,20R)-5-[(Tert-Butyldimethylsilyl)oxy]-1,19-dihydroxy-4,8,8,20-tetramethyl-16-oxo-18-(prop-1-en-2-yl)-7,9,15,17-tetraoxapentacyclo[11.7.0.02,6.06,10.014,18]icos-11-en-11-yl]methyl acetate


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