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Plots of the retention times of aniline (2) and its methyl-, (3–5), chloro- (6–8), and hydroxy-substituted (12–14) isomers evaluated using an ODS column. The eluent composition was 20 mM phosphoric acid and 30 mM triethylamine in a 70:30 (v/v) mixture of H2O and ACN.
