Study on degradation products of senkyunolide A and senkyunolide I Study on degradation products of senkyunolide A and senkyunolide I Study on chemical constituents in Cryptotaenia japonica Study on chemical constituents in Cryptotaenia japonica Chemical constituents from Guanxinning Injection Comparative study on pharmacokinetics of senkyunolide I after administration of simple recipe and compound recipe in rats Preparation of ferulic acid, senkyunolide I and senkyunolide H from Ligusticum chuanxiong by preparative HPLC