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Figure 2 . Molecular structure of C18H23N2+·Cl− showing one of two sets of a pair of enantiomers connected by a salt linkage between the proton that has been transfered from the hydrogen chloride to the desipramine (dp) group resulting in the protonation of the secondary-amine N atom of the side chain yielding an -NH2+- grouping and a chloride anion. |