Four new coumarins,(+)-senecioylprangol,(−)-3′-senecioyloxymarmesin,(+)-3′- hydroxyprantschimgin and (+)-2 ″-senecioyloxymarmesin, besides 12 known coumarins have been isolated from two Ferulago species. Their structures have been established by spectroscopic methods and partial synthesis. New synthetic 3′-oxocoumarins are also described. There is a remarkable difference in the contents of the most abundant ...
