Separation and purification of two flavonoids from Pedicularis longiflora Rudolph.var.tubiformis (Klotz). Tsoong by high-speed counter-current chromatography
ZHANG Lin1,2 , ZHAO Xiao-hui1,2*, YUE Hui-lan1
NATURAL PRODUCT RESEARCH AND DEVELOPMENT . 2014, (1): 15 -18 .