3-(2-(3,4-Dimethoxybenzoyl)-4,5-dimethoxyphenyl)pentan-2-one; Benzophenone, 2-(1-ethylacetonyl)-3',4,4',5-tetramethoxy-; Care Fexofenadine Pan intermediates,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]-