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[5-Acetyloxy-4-(dimethylamino)-6-[[(2E,4R,5R,9R,10R,11S,12S,14R)-5-ethyl-2,10,12,14-tetramethyl-7,15,18-trioxo-9-triethylsilyloxy-4-(triethylsilyloxymethyl)-6,17,19-trioxabicyclo[14.3.0]nonadec-2-en-11-yl]oxy]-2-methyloxan-3-yl] acetate


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