From the fresh whole plants of Ixeris debilis, paraffins (A) ; fatty acid esters of β-amyrin, germanicol, taraxasterol and lupeol (B) ; acetates of α-amyrin, β-amyrin, taraxasterol, φ-taraxasterol and lupeol (C) ; hexacosanol and higher fatty acids (C20-C32) (D) ; and palmitic, ursolic and oleanolic acids (E) were isolated and identified. Also in the fresh whole plants of I. dentata, paraffins (A) ; fatty acid esters of α-amyrin, β-amyrin, germanicol and lupeol (B) ; acetates of bauerenol, α-amyrin, β-amyrin, germanicol and lupeol, and olean-12-en-3-one, olean-18-en-3-one and lup-20 (29)-en-3-one (C) ; α-amyrin, β-amyrin and taraxasterol (D) ; and higher fatty acids (C14-C24) (E) were proved to be found. B and C were supposed to be principal components of the milky juice of both plants by comparison with thin layer chromatography patterns.
