Abstract:Five compounds having antidepressant activities have been isolated from the roots of Morinda officinalis,aChi-nese traditional Yang-tonic drug.These compounds were identified as succini cacid(1),nystose(2),IF-fructofura-nosylnystose(3),inulin-type hexasaccharide(4)and heptasaccharide(5)by chemical and spectroscopic methods.Allof the compounds are isolated from the species of genus Morinda for the first time.