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Ethyl 7-[(E)-3-[2-[(2S,3S,4R,6R)-6-[[(1R,3R,6R,7S,8S,9R,10R,12R,15R,16R)-9-[(2S,3R,4S,6R)-3-acetyloxy-4-(dimethylamino)-6-methyloxan-2-yl]oxy-10-hydroxy-2,6,8,10,12,14,15-heptamethyl-5,18-dioxo-4,17,19-trioxa-14-azatricyclo[14.3.0.01,3]nonadecan-7-yl]oxy]


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