Studies on the chemical constituents of Cudrania tricuspidata / 中成药

Objective: To study chemical constituents of Cudrania tricuspidata . Method: The 80% ethanolic extract of Cudrania tricuspidata was analyzed by column chromatography of silica gel and Sephadex LH 20. Result: Six compounds were extracted from the ethanolic extract part. Conclusion: They were elucidated as syringaresinol, schizandrin, gomisin A, gomisin H, ? sitosterol and ? sitosterol 3 O ? D glucopyranoside respectively. Among them, syringaresinol, schizandrin, gomisin A, gomisin H were obtained from this species for the first time.

Determination of the Contents of Three Ingredients in Compound Chloramphenicol Tincture by Multi?wavelength Coefficient Spectrophotometry / 中国药房

OBJECTIVE:To establish a method for simultaneously determining chloramphenicol,salicylic acid and metroni_ dazole in compound chloramphenicol tincture with no need for separation.METHODS:The concentrations of three main in?gredients were determined by multiwavelength coefficient spectrophotometry,the detecting wavelengths being277.5,297.0and317.0nm respectively.RESULTS:The average recoveries of chloramphenicol,salicylic acid and metronidazole were(100.22?0.74)%,(99.25?1.54)%and(99.79?1.92)%respectively.CONCLUSION:This method is simple,rapid and accurate.It is suitable for the determination of multicomonent preparation in hospital routine analysis.