1. Graduate School, Xizang Minzu University, Xianyang, Shaanxi 712082, P.R. China
2. Key Laboratory of High‑Altitude Hypoxia Environment and Life Health, Joint Laboratory for Research on Active Components and Pharmacological Mechanism of Tibetan Medicine, Materia Medica of Tibetan Medical Research Center of Tibet, School of Medicine, Xizang Minzu University, Xianyang, Shaanxi 712082, P.R. China