Alpha -Glucosidase inhibitory activity and molecular docking analysis of a new biflavan isolated from Impatiens macrantha - Duc Long Le; Ba Thi Cham; Thi Yen Tran; Ha Nguyen Xuan; Ngoc Binh Vo; Nguyen Thi Le Huyen; Tran Ngoc Dan Thanh; Do Van Truong; Quoc Anh Ngo; Nguyen Thi Thuy Linh (Natural Product Research, 2026)