Studies on Seed Dormancy Mechanism and Breaking Technique of Wild Notopterygium incisum studies on the Chemical Constituents of Notopterygium incisium Ting Ⅲ Chemical Constituents Isolated and Identified from Petroleum Etber Extracts of N. incisium Ting Determination of isoimperatorin and osthol in Ganmao Yixiaoshi capsule by RP-HPLC