[1] Yunnan Univ, Sch Chem Sci & Technol, Minist Educ, Key Lab Med Chem Nat Resource, Kunming 650091, Peoples R China
[2] Chinese Acad Sci, Kunming Inst Bot, State Key Lab Phytochem & Plant Resources West Ch, Kunming 650204, Peoples R China
[3] Yunnan Minzu Univ, State Ethn Affairs Commiss, Key Lab Ethn Med Resource Chem, Kunming 650500, Peoples R China
[4] Yunnan Minzu Univ, Minist Educ, Kunming 650500, Peoples R China