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(1R,2R,5R,7R,8R,9R,11R,14R,15R)-8-[(2S,3R,4R,6R)-4-(Dimethylamino)-3-hydroxy-6-methyloxan-2-yl]oxy-2-ethyl-9-methoxy-5,7,9,11,14-pentamethyl-3,16,18-trioxa-12-azabicyclo[13.3.0]octadecane-4,6,13,17-tetrone


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