[4,5'-Biisobenzofuran]-1,1',3,3'-tetraone
https://www.finechem.org/shop/fm-in-da007cjg-45-biisobenzofuran-11-33-tetraone-82553
https://www.finechem.org/web/image/product.template/82553/image_1920?unique=ef1e0df
Biisobenzofuran Tetraone, high-purity chemical for polymer synthesis, epoxy resins, and laboratory research.
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