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. 2013 Jul 21;6(Suppl 1):9–14. doi: 10.4137/IJTR.S11459

Figure 1.

Figure 1

Representative chromatograms of l-Trp (A), l-KYN (B), I.S. (50 μM) (C), and I.S. (2.5 μM) (D), respectively, after derivatization with (R)-DBD-PyNCS.