A benzofuranone type of compound known as 7-hydroxy-3-(1-hydroxyethyl)-5methoxy-3. 4-dimethylisobenzofuran-1 (3H)-one (1) and 4. 8-dihydroxy-6-methoxy-3. 4. https://www.fitnessgravesyardes.shop/product-category/roller-pad/