A New Ursane-Type Triterpene from the Fermented Shallot Allium Ascalonicum, Van Chuyen, Nguyen, Son Nguyen Hong, Van Hien Pham, Giang Dang Truong, Minh Ho Ba Ngoc, Mai Ngo Thi Tuyet, Van Men Chu, Son Ho Anh, and Duong Vu Binh , Pharmacognosy Journal, January 2021, Volume 13, Issue 1, p.01-07, (2021)