3,7-Dihydroxy-3',6'-dimethoxy-2'-methylspiro(benzofuran-2(3H),1'-(2,5)cyclohexadiene)-4'-one;Spiro(benzofuran-2(3H),1'-(2,5)cyclohexadiene)-4'-one, 3,7-dihydroxy-3',6'-dimethoxy-2'-methyl-
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