Vortioxetine 1-(2-(2,5-dimethylphenylthio) phenylpiperazine)

This compound is a structurally distinct impurity derived from vortioxetine, featuring a piperazine ring linked to a phenylthio group substituted with 2,5-dimethylphenyl moieties. The thioether bridge and dimethyl substitution differentiate it from the parent drug's methoxybenzyl motif. Its core scaffold retains the phenylpiperazine pharmacophore but introduces steric and electronic alterations via sulfur linkage and methyl groups. This impurity arises during synthetic pathways involving thiolation reactions. It serves as an HPLC reference standard for quantifying process-related impurities in vortioxetine formulations.