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2,3,5-Trimethyl-4-[2,3,5-trimethyl-4-[[(4R)-1-hydroxy-3-methylene-4,5,8,9aalpha-tetramethyl-6-methoxy-7-(2,3,6-trimethyl-4-carboxy-5-methoxyphenoxycarbonyl)-12-oxo-4beta,4abeta-(epoxymethanoxy)-4,4a,9,9a-tetrahydro-3H-xanthene-2-yl]carbonyloxy]-6-methoxyb


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