Two new coumarins, 6-(3-carboxybut-2-enyl)-7-hydroxycoumarin and the 3
'-acetate of oxypeucedanin hydrate, were isolated from the roots of Pe
ucedanum oshuthium, and their structures were established mainly by ma
ss spectrometry and 2D NMR techniques. Copyright (C) 1996 Elsevier Sci
ence Ltd.