From CENTAUREA STOEBE the following compounds have been isolated: cnicin, salonitenolide, salonitenolid-8- O-(4'-acetoxy-5'-hydroxyangelate), stoebenolide, 3-hydroxy-2-methylbutyrolactone, and 3-(3, 4-dihydroxy-5-methoxyphenyl)-prop-1-yl 3-hydroxy-11-methyloctadecanoate.