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(3S)-5beta-(2-Oxo-1,3-dioxolane-4-yl)-5-hydroxy-5'-methyl-7'-methoxy-9beta-[2-(methylamino)-2-deoxy-alpha-D-fucopyranosyloxy]-3abeta,5,9,9abeta-tetrahydro-1-oxaspiro[1H-cyclopenta[a]-s-indacene-3(2H),1'(2'H)-naphthalene]-2,2'-dione


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