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. 2023 Dec 23;29(1):109. doi: 10.3390/molecules29010109

Figure 2.

Figure 2

Chromatogram of a leaf extract (E) of Dioscorea polystachya using taxifolin (T), luteolin (L), quercetin (Q), morin (M), fisetin (F), and isoliquiritigenin (I) as references detected at (A) 254 nm and (B) 366 nm after spraying with 2-aminoethoxy diphenyl borate. (C) Results of the color reaction for the detection of flavonoids in three leaf extracts (E1–E3) of Dioscorea polystachya. A methanolic solution of quercetin (Q) served as a positive control; the extracting solvent nitric acid (N, 12% w/v) was used as a negative control.