Effect of extracts of Ligusticum chuanxiong and Angelica sinensis on MAPK pathway and cycle proteins in vascular smooth muscle cells Polysaccharides from Ligusticum chuanxiong Study on degradation products of senkyunolide A and senkyunolide I Study on degradation products of senkyunolide A and senkyunolide I Studies on chemical constituents of Ligusticum chuanxiong Preparation of ligustilide from rhizome of Ligusticum chuan xiong Species and quality of geo-authentic Ligusticum chuanxiong in Sichuan Province Chemical constituents from Guanxinning Injection Pharmacokinetics of ligustilide in Ligusticum chuanxiong essential oil in rats in vivo