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. 2022 Mar 3;17(3):e0264632. doi: 10.1371/journal.pone.0264632

Fig 8. (A) 1H-NMR, (B) C13-NMR spectrum and isolated compounds (C) Quercitrin of P-2 sample obtained from RP-HPLC of HWHF.

Fig 8

Proton-decoupled natural abundance 1H- NMR and C13- NMR spectrum of peak-2 sample of HWHF (obtained from chromatograph over the period of 70% acetonitrile from 10 to 40 min with retention time of 20 min) at 40 °C. The spectrum was obtained at 600 MHz after 119044 transients (14 h) by the pulsed Fourier transform method on a Varian XL-100 A spectrometer. Representative structure of flavonoids, corresponding to the molecular formula of quercitrin is C21H20O11.