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. 2020 Aug 13;56(8):408. doi: 10.3390/medicina56080408

Figure 1.

Figure 1

Gas chromatography-mass spectrometry (GC-MS) total ion chromatograms of: (A) Extract of 1 mL drug-free urine spiked with 0.3 ng of UR-144 (1), UR-144 N-(5-hydroxypentyl) (2), JWH-122 (3), JWH-210 (4), JWH-122 N-(4-hydroxypentyl) (5), JWH-210 N-(4-hydroxypentyl) (6), JWH-122 N-(5-hydroxypentyl) (7) and JWH-210 N-(5-hydroxypentyl) (8). (B) Urine sample positive to UR-144 (1) and UR-144 N-(5-hydroxypentyl) (2); (C) Urine sample positive to JWH-122 (3), JWH-122 N–(4-hydroxypentyl) (5) and JWH-122 N-(5-hydroxypentyl) (7); (D) Urine sample positive to JWH-210 (4) and JWH-210 N-(4-hydroxypentyl) (6) and JWH-210 N-(5-hydroxypentyl) (8).