Studies on antihemorrhagic substances in herbs classified as hemostatics in Chinese medicine. IV. On antihemorrhagic principles in Hypericum erectum Thunb.

Abstract
Antihemorrhagic principles were isolated from H. erectum (Hypericaceae) by a combination of countercurrent distribution and Sephadex LH-20 column chromatography, and identified as wedelolactone [5'',5,6-trihydroxy-7''-methoxycumarino-(3'',4'':3,2)-coumarone] (1,8,9-trihydroxy-3-methoxy-6-oxo-6H-[z]benzofuro[3,2-c][z]benzopyran) and demethylwedelolactone [5'',7'',5,6-tetrahydroxylcumarino-(3'',4'':3,2)-coumarone](1,3,8,9-tetrahydroxy-6-oxo-6H-[z]-benzofuro[3,2-c][z]benzopyran).