Mangiferin (I) form Tripterospermum taiwanense Stake and oleanolic acid (III) form Gentiana arisanensis Hayata have been isolated, respectively. 產植物:臺灣肺形草(Tripterospermum taiwanese Stake)及阿里山龍膽草(Gentiana aris-sis Hayata)經抽取分離結果,由前者證明出得mangiferin(I),後者得oleanolic acid (Ⅲ)其mangiferin(I)係首次從臺產龍膽科植物中被分繼而得。