Study on degradation products of senkyunolide A and senkyunolide I Study on degradation products of senkyunolide A and senkyunolide I In vitro dissolution of Qishe Pills Determination of Z-ligustilide and senkyunolide A in essential oil of raw materials in Jingfukang Granule Pharmacokinetic study of ligustilide, senkyunolide A, and butylphthalide in supercritical extraction fraction from Xiongqiong Decoction in rats Determination of Z-ligustilide and senkyunolide A in essential oil of raw materials in Jingfukang Granule