Abstract: The authors of the present paper extracted the precipitates of the acidified solution resulted from the diluted alkaline solution soaked the roots of Stellera Chamaejasme L, evaporated the extract, acetylated the residue, hydrolyzed the acetylated product, separated the resulted substance by TLCand obtained a phenolic composition. The authors determined this composition by IR, UV, MSand NMRand defined its structure as 7-methoxychamaejasmine.