“…3). Spectroscopy data showed signals characteristic of quercetin-3-Oα-arabinopyranoside (Wollenweber et al 1997;Ahmadu et al 2007), described for the first time for this species. The 1 H-NMR (500 MHz, CD 3 OD) displayed characteristic signals of the aglycone quercetin δ H 6.21 (1H, d, J = 2.0, H-6), 6.41 (1H, d, J = 2.0, H-8), 7.74 (1H, d, J = 2.2, H-2'), 6.90 (1H, d, J = 8.5, H-5'), 7.57 (1H, dd, J = 2.2 and 8.5, H-6') and sugar signals δ H 5.10 (1H, d, J = 6.7, H-1''), 3.90 (1H, dd, J = 6.6 and 8.5, H-2''), 3.65 (1H, dd, J = 3.1 and 8.4, H-3''), 3.83 (1H, s, J = 8.5, H-4''), 3.80 (1H, d, J = 3.5, H-5a''), and 3.43 NO and TNF-α inhibition and cytotoxicity of isolated compounds in LPS-stimulated RAW 264.7 cells Quercetin (2) presented the highest potential in NO (IC 50 4.58±0.95 µg/mL) and TNF-α (IC 50 33.25±0.88 µg/mL) inhibition.…”