Pramepexole 2HCl

Pramepexole 2HCl is a dihydrochloride salt of the antiparkinsonian agent Pramepexole, featuring a substituted piperazine ring fused to a thiazole moiety, with a terminal aromatic amine. The compound exhibits two protonated amine groups and a chlorinated thiazole core, distinguishing it from the parent drug via additional chloride counterions and altered substitution patterns. Synthetically derived as a byproduct during Pramepexole’s chlorination step, it serves as a critical HPLC reference standard for quantifying residual impurities in pharmaceutical formulations.