Anticoagulation activity-guided fractionation led to the isolation of
seven triterpenoid compounds from the methanol extract of the whole pl
ant of Geum japonicum and their identification was based on spectrosco
pic methods. Of these compounds, 19 alpha-hydroxyasiatic acid (2 alpha
, 3 beta, 19 alpha, 23-tetrahydroxy-12-ursen-28-oic-acid) showed signi
ficant anticoagulant effect on the extrinsic pathway. (C) 1998 John Wi
ley & Sons, Ltd.