Isolation of two new coumarin glycosides from Notopterygium forbesii and evaluation of a Chinese crude drug, Qiang-Huo, the underground parts of N. incisum and N. forbesii, by high-performance liquid chromatography. - Gu,Z.M.; Zhang,D.X.; Yang,X.W.; Hattori,M.; Namba,T. (Chem Pharm Bull, 1990)