Separation of dehydrocavidine from Corydalis saxicola by preparative chromatography Studies on the kinetics of cell growth and nutrient consumption in cell suspension cultures of Corydalis saxicola Anti-hepatitis virus constituents from Corydalis saxicola Analysis on ITS sequence differences of Corydalis tomentella and C. saxicola Anti-hepatitis virus constituents from Corydalis saxicola Analysis on ITS sequence differences of Corydalis tomentella and C. saxicola Study on alkaloids from Corydalis saxicola and their anti-oxidative activities