Abstract: Eight compounds,contigoside A(1),contigoside B(2),onychin (3),trans-cinnamic acid(4),wallichoside (5),β-sitosterol (6),daucosterol (7),and sucorse (8) were isolated from the methanolic extract of the aerial parts of Onychium contiggum.Compound 1 and 2 were new ones. Trans -cinnamic acid (4) was isolated from Onychium for the first time. Their structures were assigned by a combination of one and two dimensional NMR techniques.

Key words: Onychium contiggum, Sinopteridaceae, Flavone and flavone glycoside