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. 2021 Feb 17;26(4):1046. doi: 10.3390/molecules26041046

Figure 1.

Figure 1

(A): Standard solution of BAs (10 µg/mL each); (B): L. barbarum leaves sample (IS unspiked); (C): L. barbarum leaves sample; (D): L. barbarum leaves sample (Dns-Cl unspiked); (E): Dns-Cl solution (20 µg/mL); (F): control group: 10 mL 1 M HCl replacing the 10 mL sample extract derived with Dns-Cl. Chromatographic peaks: (1) MET; (2) TRP; (3) PEA; (4) PUT; (5) CAD; (6) HIS; (7) DMP; (8) 5-HT; (9) TYR; (10) SPD; (11) DA; (12) SPM.