Diterpenoid Alkaloids from the Aerial Parts of Aconitum flavum Hand.-Mazz

Sixteen diterpenoid alkaloids(DAs),including six aconitine-type alkaloids(5 and 9−13),seven 7,17-seco-aconitine-type alkaloids(1−4,6−8),two napelline-type alkaloids(14 and 15)as well as one veatchine-type alkaloid(16),were isolated from the aerial parts of Aconitum flavum Hand.-Mazz.In which,flavumolines A−D(1−4)were four new ones,and flavu-moline E(5)was reported as natural compound for the first time.Their chemical structures were elucidated by the analysis of extensive spectroscopic data.The inhibitory activities of these isolates on Cav3.1 low voltage-gated Ca^(2+)channel,NO production in LPS-activated RAW264.7cells,five human tumor cell lines,as well as acetylcholinesterase(AChE)were tested.

分光光度法测定伏毛铁棒锤总生物碱的含量

目的建立伏毛铁棒锤中总生物碱含量测定的方法。方法用分光光度法测定伏毛铁棒锤中总生物碱的含量。以乌头碱为对照品,溴甲酚绿为酸性染料,缓冲溶液pH=3条件下,氯仿萃取45min,于416nm波长处测定其吸光度。结果乌头碱在7.70～26.18mg/L浓度范围内线性关系良好,回归方程A=0.0318C+0.0083(r=0.9994),精密度良好,RSD=0.99%;样品溶液显色后4h内稳定,RSD=1.27%。本法测定的重复性良好,RSD=1.75%;平均加样回收率为100.89%,RSD=1.82%。结论该法简便、准确,可用于伏毛铁棒锤中总生物碱的含量测定。