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[(4R,5R,6S,7R,10R,11S,12R,13S,14S,15Ar)-11-[[(3aS,4S,6R,7aR)-4,7a-dimethyl-2-oxo-3a,4,6,7-tetrahydro-[1,3]dioxolo[4,5-c]pyran-6-yl]oxy]-7-[(2R)-1-[(2R,3R,4R,5R,6R)-5-acetyloxy-3,4-dimethoxy-6-methyloxan-2-yl]oxypropan-2-yl]-13-[(2S,3R,6R)-3-acetyloxy-4-me


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