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[(1R,6R,10E,13S)-12-[(2S,3S)-3-Acetyloxy-2-(2-hydroxyethyl)oxetan-3-yl]-10-hydroxy-13-[2-(3-methoxyphenyl)-2-oxoethyl]-7,11,14,14-tetramethyl-3,9-dioxo-2,4-dioxatricyclo[6.5.1.01,5]tetradeca-7,10-dien-6-yl] (2R,3S)-2-hydroxy-5-methyl-3-[(2-methylpropan-2-


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