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5,5',7,7'-Tetramethoxy-2,2'-bis(4-methoxyphenyl)[8,8'-bi(4H-1-benzopyran)]-4,4'-dione Structure

5,5',7,7'-Tetramethoxy-2,2'-bis(4-methoxyphenyl)[8,8'-bi(4H-1-benzopyran)]-4,4'-dione