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Spectroscopic and chromatographic identification of dimethylamphetamines.

The qualitative analysis of the 6 isomeric dimethylamphetamines (both methyl groups on the aromatic ring) is described. Their ultraviolet, mass, and proton magnetic resonance spectra are similar, but infrared spectra allow a positive identification to be made, and reference spectra are provided. Melting point and gas-liquid and thin layer chromatographic data are also presented.