Lannea

Islam, M.T. and Tahara, S., Dihydroflavonols from Lannea coromandelica. Phytochemistry, 54, 901, 2000. 

Only 15 newly reported simple dihydroflavonols are listed in Table 15.9. Several of the compounds are just simply the C-3 epimers of known (2i ,3i )-dihydroflavonols, e.g., (2R,3S)-3-hydroxy-5,7-dimethoxyflavanone (329) from the fern Woodsia scopulina (Dryopterida-ceae), (2i ,3S)-3,5,3, 4 -tetrahydroxy-7-methoxyflavanone (3-epipadmatin, 333) from Inula graveolens (Asteraceae),(2i ,3S)-3,5,3 -trihydroxy-7,4 -dimethoxyflavanone (337) from Lannea coromandelica (Anacardiaceae), and (2i ,3S)-3,5,7,3, 4, 5 -hexahydroxyflavanone (hovenitin III, 338) from the seeds and fruits of Hovenia dulcis (Rhamnaceae). The previously known (2i ,3i )-stereoisomer of hovenitin III has the trivial name ampelopsin. The same plant source has yielded the (27 ,37 )- and (27 ,3S)-epimers of 3,5,7,4, 5 -pentahydroxy-3 -methoxyflavanone, which are known as hovenitins I (340) and II (341), respectively. ... 

Lannea. Gum from Lannea grandis (Odina wodier) is routinely used in India for a whitewash base because of its availability and large yields. 

Lannea edulis (Sond.) Engl, [umtfokolovu, wild grape] (Anacaidiaceae) root bark concoction is used for constipation 12). The stem bark and root concoction is also used in the treatment of dysentery. The stem bark contains flavonoids, glycosides, polyphenols, steroids and tannins 15). 

Lannea nigritana (Sc. Ell.) Keay. Unknown name Intestinal parasites (B) Water boiling... 

Lannea velutinaA. Unknown Secondary amenorrhoea Water boiling... 

Lannea coromandelica L. (Anacardiaceae) is a deciduous tree widely distributed in Bangladesh, India and some other tropical countries. Plants belonging to this genus are used in folk medicine for treatment of elephantiasis, impotence, ulcers, vaginal troubles, halitosis, heart disease, dysentery, gout and rheumatism [108]. Stem bark extracts of L. coromandelica exhibited potent zoospore motility inhibitory activity followed by characteristic lysis. Identification of active principles and their mode of action toward zoospores are briefly discussed here. 

Fig. (8). Possible structural units (A-D) of Lannea coromandelica (stem bark) polyflavonoid tannins, and structures of typical linear-and angular-type trimers.

Fig. (9), MALDI-TOF mass spectrum of Lannea coromandelica extract, Insels showing expanded form of some important parts of the MALD1-TOF-MS spectrum [113]. For each oligomer, substructures with mass increments of 16 Da appear, indicating different combinations of various substrutures.

Medium within 60 min (Fig. lOd). Zoosporicidal activities of other two commercial tannins, Quebracho and Mimosa were similar to that of Lannea tannin. In contrast, 22 lw7-anacardic acid (27) isolated from the Ginkgo biloba caused shrinkage of zoospores followed by bursting at a single point of each spore without forming any characteristic fragmentation of cellular materials [104]. 

Govindachari, T. R., P. C. Parthasarathy, H. K. Desai, and P. A. Mohamed Cluytyl ferulate, a new long chain ester from Gmelina arborea Linn, and Lannea grandis (Denust.). Indian J. Chem. 9, 1027 (1971). 

Okoth, D.A., Chenia, H.Y., and Koorbanally, N.A. 2013. Antibacterial and antioxidant activities of flavonoids from Lannea alata (Engl.) Engl. (Anacardiaceae). Phytochemistry Letters, 6, 476-481. 

Anderson D M W, Hendrie A 1970 Uronic acid materials. 35. Analytical study of gum exudates from some species of the genus Lannea. Phytochemistry 9 1585-1588... 

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