Methyl 2-[4-(4-chlorobutanoyl)phenyl]-2-methylpropanoate is a chlorinated aromatic ketone ester used as a pharmaceutical intermediate in the synthesis of fexofenadine hydrochloride. It provides a functionalized aromatic structure for subsequent chemical transformations during pharmaceutical manufacturing.

2-Chloromethyl-3,4-dimethoxypyridine hydrochloride
2-Chloromethyl-3,4-dimethoxypyridine hydrochloride is a pyridine-based pharmaceutical intermediate used in the synthesis of pantoprazole sodium. It serves as a chemical building block in

