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Fig. 2 | BMC Complementary and Alternative Medicine

Fig. 2

From: Inhibitory activities of selected Sudanese medicinal plants on Porphyromonas gingivalis and matrix metalloproteinase-9 and isolation of bioactive compounds from Combretum hartmannianum (Schweinf) bark

Fig. 2

Flavogallonic acid dilactone. Tan powder. LC-MS (negative ion mode) m/z: 469 (M-H); 1H–NMR (in CD3OD): δ (ppm) 7.26 (s), 7.50 (s). 13C–NMR (in CD3OD): δ (ppm) 108.1 (C-1, 1′), 110.1–114.4 (C-6, 6′), 112.8 (C-5), 113.3 (C-6″), 117.5–120.2 (C-5″), 124.9 (C-1″), 135.7 (C-2), 136.3 (C-3), 136.5 (C-4), 137.8 (C-2′), 139.2 (C-3′), 143.2 (C-4′), 144.1 (C-3″), 145.9 (C-4″), 147.8 (C-5″), 158.9–160.4 (C-7, 7′), 168.9 (C-7″)

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