从金铁锁 (PsammosilenetunicoidesW .C .WuetC .Y .Wu)根部分离得到 5个齐墩果烷型五环三萜皂苷。它们的结构通过波谱和化学方法分别鉴定为 :3 O β D galactopyranosyl (1→ 2 ) β D glucuronopyranosyl gypsogenin (1) ,3 O β D galactopyranosyl (1→ 2 ) [β D xylopyranosyl (1→ 3) ] β D glucuronopyranosyl gypsogenin (2 ) ,3 O β D galactopyranosyl (1→ 2 ) β D glucuronopyra nosyl gypsogenin 2 8 O β D xylopyranosyl (1→ 4 ) [β D glucopyranosyl (1→ 3) ] α L rhamnopyranosyl(1→ 2 ) β D fucopyranoside (LobatosideI ,3) ,3 O β D galactopyranosyl (1→ 2 ) [β D xylopyranosyl (1→ 3) ] β D glucuronopyranosylgypsogenin 2 8 O β D xylopyranosyl (1→ 4 ) [β D glucopyranosyl (1→ 3) ] α L rhamnopyranosyl(1→ 2 ) β D fucopyranoside (4 ) ,3 O β D galactopyranosyl (1→ 2 ) β D glucuro nopyranosyl gypsogenin 2 8 O β D xylopyranosyl (1→ 4 ) [β D 6 O acetylglucopyranosyl (1→ 3) ] α L rh amnopyranosyl(1→ 2 ) β D fucopyranoside (5 )。其中 5为新化合物 ,1和 2为首次从自然界中分离得到。
