เอกสารอ้างอิง : - Ogawa S, Yazaki Y. Tannins from Acacia mearnsii de wild. bark: tannin determination and biological activities. Molecules. 2018; 23(4): 837. - Doss A, Mohammed Mubarack H, Dhanabalan R. Antibacterial activity of tannins from the leaves of Solanum trilobatum Linn. Indian J Sci Technol. 2009;2(2):41-3.