A new triterpene, a-amyrin hexacosoate (I) was isolated together with four known triterpenes, a-amyrenone (II), betulinic acid (III), oleanolic acid (IV) and ursolic acid (V), from the stems and leaves of rosemary (Rosmarinus officinalis L.) .

• 从昆明产的迷迭香(Rosmarinus officinalis； L.；) 的茎叶中分离得到五个三萜类化合物( I~V )；经光谱等方法鉴定其结构为:a-香树素二十六烷酸脂?