Isolation and Structural Characterization of Compounds from Blumea lacera, Pham, Xuan Phong, Nhung Tran Thi Tuyet, Trinh Hoai Nam, Trung Do Minh, Giang Dang Truong, Vu Binh Duong, Diep Nguyen Tr?ng, Van Long Nguyen, Nguyen Van Thu, and Van Men Chu , Pharmacognosy Journal, July 2021, Volume 13, Issue 4, p.999-1004, (2021)