Bark: The bark is prosperous in phenolics, condensed tannin and phlorotannin, gallic acid, protocatechuic acid pyrocatechol, (+)- catechin, (-) epigallocatechin-7-gallate, and (-) epigallocatechin-5,7- digallate, (-) epicatechin, (+) dicatechin, quercetin, (+) leucocyanidin gallate, sucrose and (+) catechin-5-gallate. 7, 9, 11, 18, 19, 22, 34, 35, 36 It contain 12- 20% of tannin. 7, 11, 22, 33 Bark contain a large quantity of tannin .
Gum: Gum contains galactose, L-rhamnose, L-arabinose and four aldobiouronic acids, viz.6-o-(?-glucopyranosyluronicacid)-Dgalactose;6-o-(4-o-methyl-?-D-gluco pyranosyluronicacid)-Dgalactose; 4-o-(?-D-glucopyranosyluronic acid)-D-galactose; and 4- o-(4-o-methyl-?-D- glucopyranosyluronic acid)-D- galactose. 11, 18, 19, 22 Fruit: It contains a high percentage of phenolic constituents consisting of m-digallic acid, gallic acid, its methyl and ethyl esters, protocatechuic and ellagic acids, leucocyanidin, m-digallic dimer 3,4,5,7-tetrahydroxy flavan-3-ol, oligomer 3,4,7-trihydroxy flavan 3,4-diol and 3,4,5,7-tetrahydroxy flavan-3-ol and (-) epicatechol.
Fruit also contains mucilage and saponins.36 It contains 32% tannin.29 Flowers and pods: It contains stearic acid, kaempferol-3- glucoside, isoquercetin, leucocyanidin. 11, 18 Pods contain tannin 22.44%, expressed in terms of oxalic acid; Wood contain chlorides.32 Whole pods contain 12-19% of tannin and 18-27% after removal of seeds. 11, 22, 33. Seeds contain amino acids, fatty acids, ascorbic acid, and tannin as a major constituent, 18, 19 sugar, moisture 14%, ash 3-4%; pods have got 22-44% tannin.15 Leaves: It contains apigenin, 6-8-bis-D-glucoside, rutin, and 32% tannin.29.