Determination of leonurine in leonurus granule and extractum by UPLC A Double-blind Clinical Study on Effects of Tablet Apocynum venetum L.Ex(?)ractum on Anti-Senility Comparison of different harvest ways of Dendrobium officinale Study on suitable harvest time of Dendrobium officinale in Yunnan province Effect and mechanism of Huatuo Zaizao extractum on focal cerebral ischemia/reperfusion-induced blood-brain barrier inury in rats Study on effect of Huatuo Zaizao extractum on focal cerebral ischemia/reperfusion neurogenesis in rats and its mechanisms Study on Recovery of Ethyl Acetate After Extracting TripterygiumWifordii Extractum with Ethyl Acetate