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[(1S,19R,21S,22R,23R)-23-Acetyloxy-6,7,8,11,12,13-hexamethoxy-3,16-dioxo-21-(3,4,5-trimethoxybenzoyl)oxy-2,17,20-trioxatetracyclo[17.3.1.04,9.010,15]tricosa-4,6,8,10,12,14-hexaen-22-yl] 3,4,5-trimethoxy-2-[(1R,4R)-1-(2-methoxy-2-oxoethyl)-3,6-dioxo-2,5-di


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