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Table 1 Spectroscopic analyses of the flavonoid compounds isolated from F. vasta leaves hydroalcoholic extract

From: Phenolic profile and biological properties of the leaves of Ficus vasta Forssk. (Moraceae) growing in Egypt

Compound Physical state 1H-NMR data UV data MS data
Luteolin Yellow powder 1H-NMR (DMSO-d6, 400 MHz): δ ppm 12.9 (1H, s, 5-OH), 7.4 (1H, d, J = 8 Hz,, H-6′), 7.38 (1H, d, J = 2 Hz, H-2′), 6.85 (1H, d, J = 8 Hz, H-5′), 6.6 (1H s, H-3), 6.4 (1H, d, J = 2 Hz, H-8), 6.15 (1H, d, J = 2 Hz, H-6)..   EI-MS: m/z 286
Quercetin Yellow powder   UV λmax (MeOH): 255, 267, 371; (NaOMe): 270, 320, 420; (AlCl3): 270, 455; (AlCl3/HCl): 264, 303sh, 315sh, 428; (NaOAc): 257, 274, 318, 383; (NaOAc/H3BO3): 259, 387. EI–MS: m/z 302.
Vitexin Yellow amorphous powder 1H-NMR (DMSO-d6, 400 MHz): δ 8.04 (d, J = 8.5 Hz, 2H, H-2′,6′), 6.88 (d, J = 8.5 Hz, 2H, H-3′,5′), 6.42 (s, 1H, H-3), 6.74 (s, 1H, H-6), 4.65 (d, J = 9.6 Hz,1H, H-1). UV λmax (MeOH): 269, 331; (NaOMe): 279, 325 (sh), 391; (AlCl3): 276, 303 (sh), 346, 382; (AlCl3/HCl): 277; 303, 343, 380 (NaOAc): 278, 387 (NaOAc/H3BO3): 270, 319, 346. ESI-MS m/z: 433 [M + H]+.
Quercetin 3-O-β-galactoside Yellow crystals 1H-NMR (DMSO-d6, 400 MHz): δ 7.78 (1H, dd, J = 2, 8.5 Hz, H-6′), 7.54 (1H, d, J = 2 Hz, H-2′), 6.82 (1H, d, J = 8.5 Hz, H-5′), d 6.42 (1H, d, J = 2 Hz, H-8), 6.24 (1 H,d, J = 2 Hz, H-6), 5.5 (1H, d, J = 7.5 Hz, H-1″).   (−)ESI-MS: m/z 463 [M-H].
Quercetin 3-O-rutinoside (Rutin) Yellow powder 1H-NMR (400 MHz, DMSO-d6): δ ppm 7.54 (2H, m, H-2′/6′), 6.85 (1H, d, J = 9 Hz, H-5′), 6.38 (1H, d, J = 2.5 Hz, H-8), 6.19 (1H, J = 2.5 Hz, H-6), 5.35 (1H, d, J = 7.5 Hz, H-1″), 4.39 (1H, s, H-1″‘), 3.90–3.20 (m, remaining sugar protons), 0.99 (3H, d, J = 6 Hz, H-6″‘). UV λmax (MeOH): 258, 269, 361; (NaOMe): 276, 322, 416; (AlCl3): 232, 276, 302, 366; (AlCl3/HCl): 232, 276, 302, 366; (NaOAc): 284, 306, 381; (NaOAc/H3BO3): 261, 312, 376.