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(1R,2R,5R,6R,10S,11R,14R,16R,17R,18S)-5-Ethyl-17-[(2S,3R,4R,6R)-3-hydroxy-6-methyl-4-(methylamino)oxan-2-yl]oxy-2,6,11,12,14,16,18-heptamethyl-4,7,9,19-tetraoxa-12-azatricyclo[14.2.1.06,10]nonadecane-3,8-dione


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