Abstract: Three new diterpenoid alkaloids from roots of Aconitum scap-osum Franch. Their chemical structures were established by meanq of MS, IR, 1H NMR, l3C NMR, UV and were confirrned by chemical methods. Alkaloid I designated scaconine (I ).

Key words: Aconitum scaposum

摘要： 从花葶乌头根中分到三个新二萜生物碱成分：花葶乌头宁（scaconine）、花葶乌头碱（scaconitine）及N一去乙酰花葶乌头碱（N－deacetylscaconitine）。经质谱、红外光谱、紫外光谱、核磁共振氢谱、核磁共振碳谱解析及皂化、水解、甲基化、氧化、常法乙酰化及全乙酰化反应验证，其结构分别证明为（Ⅰ）、（Ⅱ）、及（Ⅲ）。

关键词: 花葶乌头、花葶乌头宁、花葶乌头碱、N一去乙酰花葶乌头碱