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Einecs 239-479-8 Tofisopam Impurity 6 Tofisopam intermediate Benzophenone, 2-(1-ethylacetonyl)-3',4,4',5-tetramethoxy- 3-[2-(3,4-Dimethoxybenzoyl)-4,5-dimethoxyphenyl]pentan-2-one 3-[2-(3,4-Dimethoxybenzoyl)-4,5-dimethoxyphenyl]-2-pentanone 2-Pentanone,3-[2-(3,4-diMethoxybenzoyl)-4,5-diMethoxyphenyl]- Care Fexofenadine Pan interMediates, 3 - (2 - (3,4-DiMethoxybenzoyl)-4,5-diMethoxyphenyl) pentan-2-one 3-[2-(3,4-dimethoxybenzoyl)-4,5-dimethoxyphenyl]pentan-2-one 3-[2-(3,4-Dimethoxybenzoyl)-4,5-dimethoxyphenyl]-2-pentanone