Polyarillosides A−C, three undescribed triterpenoid saponins from the roots of Polygala arillata - Tran Hong Quang; Le Thi Vien; Nguyen Thi Huong; Ninh Thi Ngoc; Dang Viet Anh; Nguyen Hoang Nam; Nguyen Thi Quynh Duong; Nguyen Quoc Vuong; Nguyen Thi Thanh Ngan (Phytochemistry Letters, 2026)