Pharmacokinetics of scopolamine hydrobromide oral disintegrative microencapsule tablets in Beagle dogs determined with LC-MS/MS / 药学学报

The study aims to elucidate the characteristics of pharmacokinetics of scopolamine hydrobromide oral disintegrative microencapsule tablets in healthy Beagle dogs. Chromatographic separation was performed on a C18 column (100 mm x 3.0 mm, 3.5 microm) with methanol - 2 mmol x L(-1) ammonium formate (25 : 75) as the mobile phase. A trip-quadrupole tandem mass spectrum with the electrospray ionization (ESI) source was applied and positive ion multiple reaction monitoring mode was operated. Six Beagle dogs were randomly devided into two groups. They received oral single dose of scopolamine hydrobromide oral disintegrative microencapsule tablets 0.6 mg (test tablet) or scopolamine hydrobromide normal tablets (reference tablet). Plasma samples were collected at designed time. Plasma concentration of scopolamine hydrobromide was determined by LC-MS/MS and pharmacokinetic parameters were calculated. The pharmacokinetic parameters of test tablet vs reference tablet were as follows: C(max): (8.16 +/- 0.67) ng x mL(-1) vs (3.54 +/- 0.64) ng x mL(-1); t1/2: (2.83 +/- 0.45) h vs (3.85 +/- 0.82) h; t(max): (1.25 +/- 0.27) h vs (0.42 +/- 0.09) h; AUC(0-12h): (25.06 +/- 3.75) h x ng x mL(-1) vs (9.59 +/- 1.02) h x ng x mL(-1); AUC(0-infinity): (26.30 +/- 3.92) h x ng x mL(-1) vs (10.80 +/- 1.45) h x ng x mL(-1); MRT(0-12h): (3.38 +/- 0.34) h vs (3.86 +/- 0.26) h; MRT(0-infinity): (3.98 +/- 0.63) h vs (5.37 +/- 1.00) h. The absorption rate and AUC of test tablet is different from that of reference tablet. The bioavailability of test tablet is better than those of reference tablet.

Studies on chemical constituents of Fructus Ligustri lucidi(Ⅰ) / 第二军医大学学报

Objective: To study the chemical constituents of Chinese herb Fructus Ligustri lucidi , providing theoretic evidence for its exploitation and utilization. Methods: Chemical constituents of Fructus Ligustri lucidi were isolated and purified by solvent extraction and chromatography; their structures were identified by physiochemical properties and spectroscopic analysis. Results: Seven compounds were isolated from the ethanol extract of the fruits and identified as oleanolic acid(Ⅰ), luteolin 7 O ? D glucoside(Ⅱ), quercitrin(Ⅲ), ? sitosterol 3 O ? D glucoside(Ⅳ), p hydroxyphenethyl ? D glucoside(Ⅴ), D mannitol(Ⅵ) and hexitol(Ⅶ). Compounds Ⅱ,Ⅲ and Ⅶ were obtained from this plant for the first time. Conclusion: Seven compounds have been obtained from the title plant, which provides a base for its future use.

Isolation and Identification of Chemical Constituents in the Fruit Peels of Sinocitrus chuana Hort / 第二军医大学学报

Chemical constituents in the mature fruit peels of Sinocitrus chuana Hort were studied systematically. Five compounds were isolated and identified. They were hesperidin( Ⅰ), nobiletin(Ⅱ) tengeretin(Ⅲ), 4', 5, 7, 8-tetramethoxyflovones(Ⅳ) and synephrine(Ⅴ). Of them the fourth was isolated from this genus for the first time.