Study on chemical constituents from Heteropappus altaicus

Twelve compounds were isolated from Heteropappus altaicus. Their structures were identified as friedelin( 1),epifriedelanol( 2),dammarane-20,24-dien-3β-ol( 3),dammaraienyl acetate( 4),α-spinalster( 5),quercetin( 6),3'-methoxyquercetin( 7),quercetin-3-O-β-D-glucoside( 8),ferulic acid( 9),β-sitosterol( 10),β-daucosterol( 11) and ethyl gallate( 12). Among them,compounds 9 and 12 were first obtained from the genus Heteropappus,compounds 5,6,9 and 12 were obtained from the plant Heteropappus altaicus for the first time.