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2-[(1R,4R)-7-[6-[[(1S,19R,21S,22R,23R)-6,7,8,11,12,13,23-Heptahydroxy-3,16-dioxo-21-(3,4,5-trihydroxybenzoyl)oxy-2,17,20-trioxatetracyclo[17.3.1.04,9.010,15]tricosa-4,6,8,10,12,14-hexaen-22-yl]oxycarbonyl]-2,3,4-trihydroxyphenyl]-3,6-dioxo-2,5-dioxabicycl


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