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Enantiomers of cationic compounds of pharmaceutical relevance, namely tetrahydro‐ß‐carboline and 1,2,3,4‐tetrahydroisoquinoline analogs, were separated by high‐performance liquid chromatography. Separations were performed on Cinchona‐alkaloid‐based zwitterionic ion exchanger type chiral stationary phases applied as cation exchangers using mixtures of methanol and acetonitrile or tetrahydrofuran as...