Nitrogenous Chemical Constituents from Brassica campestris Seeds / 中国实验方剂学杂志

Objective:To study nitrogenous chemical constituents from the seeds of Brassica campestris. Method:The aerial parts of nonfat seeds were extracted with 75% ethanol heat refluxing method,then suspended in H2O and separated with ligarine and ethyl acetate to obtain respective fractions.Chemical constituents were isolated and purified by various chromatographic methods and identified by physicochemical characters and spectroscopic analysis or comparison with standard compounds. Result:Thirteen nitrogenous chemical compounds were isolated and identified as coixspirolactam C (1),indole-3-acetonitrile (2),2-β-D-glucopyranosylsulfanyl-1H-indole-3-acetonitrile (3),nicotinic acid (4),adenosine (5), 1H-indole-3-carbaldehyde (6),4-hydroxy-1H-indole-3-carbaldehyde (7),6-hydroxy-1H-indole-3-carboxylic acid (8),ethyl 2-oxo-1,2,3,4-tetrahydroquinoline-4-carboxylate (9),5-hydroxy-4(1H)-quinazolinone (10),4-hydroxy-2-quinazolinone (11),5-hydroxy-quinazoline-2(1H),4(3H)-dione (12),5-allyloxazolidin-2-one (13). Conclusion:All of the compounds were isolated from this plant for the first time, and compounds 1,3 and 13 were isolated from Brassica for the first time.

Grade Evaluation of Magnoliae Officinalis Cortex Processed with Ginger Juice Based on Relative Quality Constant / 中国实验方剂学杂志

Objective: To establish the grade evaluation standard for Magnoliae Officinalis Cortex processed with ginger juice by combining traditional morphology evaluation with modern intrinsic quality evaluation. Method: The morphological parameters and contents of intrinsic pharmacodynamic index components of 28 batches of Magnoliae Officinalis Cortex processed with ginger juice were determined, and the relative quality constants were calculated. Assuming that the average relative quality constant was 100%, more than 120%of the samples were classified as the first grade, 60%to 120%as the second grade, the remaining as the third grade. Result: The relative quality constant of Magnoliae Officinalis Cortex processed with ginger juice ranged from 0.09 to 1.78. The relative quality constant of the first grade was ≥ 0.64, the second grade was 0.32-0.64, while the third grade was ≤ 0.32. Conclusion: Relative quality constant combines external indexes of traditional morphology and internal indexes of pharmacodynamic components, which can objectively, reasonably and scientifically classify the grade of Magnoliae Officinalis Cortex processed with ginger juice, and provide reference for establishing and improving the grade evaluation standard of this decoction pieces.

Quality evaluation of Magnoliae Officinalis Cortex based on combinative method of fingerprint,quantitative analysis of multicomponents and chemometrics / 中国中药杂志

This study aims to establish a combinative method based on fingerprint,assay of multi-component and chemometrics for quality evaluation of Magnoliae Officinalis Cortex. Twenty batches of samples were determined by UPLC and a common mode of fingerprint was established. The similarities between fingerprints of 20 batches of samples were over 0. 90 and the common mode were evaluated. Eight components were identified as syringing, magnocurarine, magnoflorine, magnoloside B, magnoloside A, honokiol,magnolol,and piperitylmagnolol by comparison with reference substances and their content in samples were simultaneously determined.Based on the results,the fingerprint had good consistency between the same origin and minor diversity between the different sources.Piperitylmagnolol and peak 13 could be used as a distinction with the different sources. According to content of 8 components,Fisher discriminant analysis model was established and different source sample was classified pursuant to the discriminant fraction. It is indicated that simultaneous quantification of multi components coupled with chemometrics analysis could be a well-acceptable strategy to identify and evaluate the quality of Magnoliae Officinalis Cortex.