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Typical chromatograms of (A) 14 standard nucleoside mixtures (B) urinary nucleosides of a normal urine obtained under the established analysis conditions. Column-switching HPLC conditions as Table 2. Peak identification: 1 Pseu; 2 C; 3 U; 4 m1A; 5 I; 6 m5U; 7 G; 8 m1I; 9 m1G; 10 ac4C; 11 m2G; 12 A; 13 m22G; 14 Br8G; 15 m6A.
