TY - Bulletin of Botanical Research A1 - Jiaben Zhou, Caidan Rezeng, Maoxian Re, Cairang Limao T1 - Separation and Purification of Three Active Components from Dracocephalum tanguticum Maxim. by High-Speed Counter-current Chromatography Combined with Semi-Preparative High Performance Liquid Chromatography Y1 - 2022-03-20 JF - Bulletin of Botanical Research JO - Bulletin of Botanical Research SP - 252 EP - 258 VL - 42 IS - 2 UR - https://bbr.nefu.edu.cn N1 - 10.7525/j.issn.1673-5102.2022.02.010 ER -