“…palustre contain coumarins such as isoimperatorin, (+)oxypeucedanin, ostruthol, (+)-oxypeucedanin hydrate, columbianadin (4), peulustrin (5), and as a minor component apterin (6). It has also been reported that the extracts of fruits, herb, and roots contain a similar set of coumarins: mainly isoimperatorin, imperatorin, columbianadin, oxypeucedanin, and oxypeucedanin hydrate (7,8). Preliminary extraction tests suggested that the active compounds were in the non-polar fraction obtained from the root material of P. palustre (9).…”