取陰乾大點雨杉的葉部以甲醇重覆浸泡二次,浸泡液經減壓濃縮後,得浸泡物經萃取後,利用管柱層析法以梯度沖提法等分離技術作分離純化。 經分離純化後共得三十八個化合物,含六個新化合物,這些化學成分如下分類 : 一. 1個long chain alcohol: Nonacosanol (1) 二.7個Steroids Ergosterol peroxide (2) , (24R)-Stigmast-5-en-3ß-yl Acetate (3) , (22E,24S)-Stigmasta-5,22-dien-3ß-yl Acetate (4) , ß-Sitostenone (5) , Stigmast-4,22-dien-3-one (6) , ß-Stiosterol (7) , Stigmasterol (8) ; 三. 4個Apocartenoids : 4,4,7a-Trimethyl-4,5,7,7a-tetrahydro-benzofuran-2,6-dione (9) , Isololiolide (10) , S(+)-Dehydrovomifoliol (11) , Vomifoliol (12) 四. 3個Sesquitepenoid : (+)-ß-Eudesmol (13) , Trichothecolone (14) ,
The whole leaves of Cunninghamia konishii Hay. were extracted with methanol for two times. The combined extracts were concentrated in vacuo to give a residue, which was subjected to chromatography on silica gel with a gradient solvent system. Thirty eight compounds were isolated and puried. From them, six compound were elucidated as new coupounds. These chemical constituents were classified as follows : 1. Fatty alcohol : Nonacosanol (1) 2.seven Steroids: Ergosterol peroxide (2) , (24R)-Stigmast-5-en-3ß-yl Acetate (3) , (22E,24S)-Stigmasta-5,22-dien-3ß-yl Acetate (4) , ß-Sitostenone (5) , Stigmast-4,22-dien-3-one (6) , ß-Stiosterol (7) , Stigmasterol (8) ; 3. four Apocartenoids : 4,4,7a,-Trimethyl-4,5,7,7a-tetrahydrobenzofuran-2,6-dione (9) , Isololiolide (10) , (S)-(+)-Dehydrovomifoliol (11) , Vomifoliol (12) 4. three Sesquitepenoids : (+)-ß-Eudesmol (13) , Trichothecolone (14) ,