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(1R,2R,5R,6S,10R,11S,12E,13R,15R,16R,17S)-16-[[(3Ar,4S,6R,7aS)-1,6-dimethyl-2-oxo-4,6,7,7a-tetrahydro-3aH-pyrano[4,3-d][1,3]oxazol-4-yl]oxy]-5-ethyl-12-hydroxyimino-2,6,11,13,15,17-hexamethyl-4,7,9,18-tetraoxatricyclo[13.2.1.06,10]octadecane-3,8-dione


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