Five triterpenoids from the stems of Lasianthus bidoupensis V.S. Dang & Naiki (Rubiaceae) - Nguyen, Thi-Quynh-Trang; Doan, Tuan; Nguyen, Thi-Diem-Huong; Nguyen, Thi-Hoai-Thu; Pham, Nguyen-Kim-Tuyen (VNUHCM Journal of Advanced Research in Natural Sciences, 2023)