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Tert-butyl [(1R,2R,5R,6S,7S,8R,9R,11S,12R,13R,14R)-8-[(2S,3R,4S,6R)-4-(dimethylamino)-6-methyl-3-trimethylsilyloxyoxan-2-yl]oxy-2-ethyl-11-fluoro-9-hydroxy-6-[(4R,5S,6S)-4-methoxy-4,6-dimethyl-5-trimethylsilyloxyoxan-2-yl]oxy-1,5,7,9,11,13-hexamethyl-4,16


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