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. Author manuscript; available in PMC: 2019 Jan 9.
Published in final edited form as: J Chromatogr B Analyt Technol Biomed Life Sci. 2018 May 16;1090:22–35. doi: 10.1016/j.jchromb.2018.05.008

Fig. 3.

Fig. 3.

Derivatization of analytes with picolinic acid. (a) reaction with DHT; (b) reaction with α-diol; (c) reaction with β-diol.