ABSTRACT
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.