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[(2R,3R,4R,5R,6R)-6-[(2S)-2-[(2R,3S,4R,5R,7S,9R,11R,12S,13R)-12-[[(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-hydroxy-3,5,7,9,11,13-hexamethyl-4-(3-methylbutanoyloxy)-6,14-dioxo-oxacyclotetradec-2-yl]propox


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