Table 2 Retention time (Rt), wavelengths of maximum absorption in the visible region (λmax), mass spectral data and tentative identification of flavonols, flavanols, flavones, and flavanones in four selected drought-tolerant vegetable amaranth
Peak no | Rt (min) | λmax (nm) | Molecular ion [M - H]− (m/z) | MS2 (m/z) | Identity of tentative compounds |
|---|---|---|---|---|---|
1 | 4.62 | 370 | 626.2142 | 626.2587 | Myricetin-3-O-rutinoside |
2 | 7.57 | 370 | 301.0487 | 301.0368 | 2-(3,4-dihydroxy phenyl)-3,5,7-trihydroxychromene-4-one |
3 | 15.52 | 370 | 270.3524 | 270.3246 | 4′,5,7-Trihydroxyflavone, 5,7-Dihydroxy-2-(4-hydroxyphenyl)-4-benzopyrone |
4 | 17.88 | 370 | 593.5264 | 593.3372 | kaempferol-3-O-rutinoside |
5 | 23.95 | 280 | 290.2341 | 290.2374 | (2R-3S)-2-(3,4-dihydroxyphenyl)-3,4-dihydro-2-chromene-3,5,7-triol |
6 | 26.76 | 280 | 271.0785 | 271.1742 | Naringenin |
7 | 54.38 | 360 | 463.3187 | 463.3421 | Quercetin-3-O-glucoside |
8 | 53.32 | 360 | 463.4584 | 463.5246 | Quercetin-3-O-galactoside |
9 | 53.35 | 360 | 609.3592 | 609.3623 | Quercetin-3-O-rutinoside |