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[(2S,3R,4S,6R)-4-(Dimethylamino)-2-[[(1S,2R,3R,7R,8S,11R,12R,13S,14R,15S,19R)-8-ethyl-12-[(2R,4S,5R,6R)-4-methoxy-4,6-dimethyl-5-phenylmethoxycarbonyloxyoxan-2-yl]oxy-2,7,11,13,15,19-hexamethyl-5,10,17-trioxo-4,6,9,16,18-pentaoxa-17lambda4-thiatricyclo[13


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