Research progress on analgesic properties of brucine Study on alkaloids from Corydalis saxicola and their anti-oxidative activities Inhibition of rutaecarpine on in vitro hepatic metabolism of five Coptis alkaloids in rats Comparison on extracting methods of total alkaloids in Crinum asiaticum seeds Content changes of six toxic components before and after Aconiti Kusnezoffii Radix combined with Trichosanthis Fructus by HPLC Advances in studies on chemical constituents in Lycopodii Herba and their pharmacological activities Cloning and expression analysis on arginine decarboxylase genes in Atropa belladonna