Study on Optimization of Supercritical Fluid Extraction Conditions of Ursolic Acid from Prunella vulgaris Linn.Leaves
JIANG Sheng-Yan, ZHAO Liang-Zhong, YU You-Gui, DUAN Lin-Dong, TAN Bao-Xiu
FOOD SCIENCE . 2008, (11): 294 -297 .