连翘中一个新木脂素单糖甙

从连翘果实中分离得到了五个单体化合物，根据理化性质和光谱分析鉴定为：对－羟基苯乙酸[p-hydroxyphenyl acetic acid](1),(+)松脂素－β-D－葡萄糖甙[(+)pinoresinol-β-D-glucoside]（2），（＋）表松脂素－4－β-D-葡萄糖甙[(+)epipinoresinol-4-β-D-glucoside]（3），（＋）松脂素单甲基醚－β-D-葡萄糖甙[(+)pinoresinol mono methyl ether-β-D-glucoside]（4），连翘甙[phillyrin](5)。其中3未见文献报告，1－4为首次从连翘中分离得到的已知成分。

A Novel Lignan Glucoside from Forsythia suspensa Vahl

从连翘果实中分离得到了五个单体化合物，根据理化性质和光谱分析鉴定为：对－羟基苯乙酸［ｐ－ｈｙｄｒｏｘｙｐｈｅｎｙｌａｃｅｔｉｃａｃｉｄ］（１），（＋）松脂素－β－Ｄ－葡萄糖甙［（＋）ｐｉｎｏｒｅｓｉｎｏｌ－β－Ｄ－ｇｌｕｃｏｓｉｄｅ］（２），（＋）表松脂素－４－β－Ｄ－葡萄糖甙［（＋）ｅｐｉｐｉｎｏｒｅｓｉｎｏｌ－４－β－Ｄ－ｇｌｕｃｏｓｉｄｅ］（３），（＋）松脂素单甲基醚－β－Ｄ－葡萄糖甙［（＋）ｐｉｎｏｒｅｓｉｎｏｌｍｏｎｏｍｅｔｈｙｌｅｔｈｅｒ－β－Ｄ－ｇｌｕｃｏｓｉｄｅ］（４），连翘甙［ｐｈｉｌｙｒｉｎ］（５）。其中３未见文献报道。

Crystal Structure of O，O－Diethyl－（α－p－Hydroxyphenyl－β－Nitroethyl）phosphonate

The crystal structure of the title compound C_12H_18NO_6P has been determined by X-ray diffraction methods. It belongs to orthorhombic space group Pabc with cell parameters: a=10. 708(5), b=16.151(4), c=17. 615(2) A, V=3046. 4 A￣3, Z=8, D_c= 1. 39 g/cm￣3, F(000)=1280, μ=29. 77cm￣(-1) (CuKα), M_r= 303. 25 ,R=0. 065, R_w= 0. 055. In the molecule, the P atom is coordinated by three O and one C atoms with a distorted tetrahedral configuration.

Determination and pharmacokinetic study of p-hydroxyphenethyl anisate following intravenous and oral administration in rats by RP-HPLC method

In the present study,we developed a rapid and specific reversed-phase high-performance liquid chromatographic(RP-HPLC)method for the quantification of p-hydroxyphenethyl anisate(HPA),one of the main bioactive constituents of the roots and rhizomes of Notopterygium incisum and N.franchetii,in rat plasma after an intravenous(20 mg/kg,i.v.)and an intragastrical(200 mg/kg,i.g.)administration to rats,respectively.The method involved a plasma clear-up step using liquid-liquid extraction by EtOAc,followed by RP-HPLC separation and detection.Separation of HPA was performed on an analytical DiamonsilTM ODS C18 column with the mobile phase of MeOH-H2 O at ratios of 75:25(v/v)for i.v.and 70:30(v/v)for i.g.administration.The flow-rate was 1.0 mL/min,and UV detection was performed at 256 nm.The calibration curves were linear over the ranges of 0.05-5.0μg/mL(r2=0.9984)for i.v.and 0.5-10.0μg/mL(r2=0.9995)for i.g.administration in rat plasma.The extraction recoveries were in the range of82.01%-87.97%.The intra-and inter-day precisions were between 1.71%and 3.99%,with accuracies ranging from 91.22%to110.5%.The absolute bioavailability of an orally administered HPA in rats was about 48.17%.The developed method was suitable for the determination and pharmacokinetic study of HPA in rat plasma.