METHODS The compound was synthesized through the reaction of cyclization, split, bromination et al and using 1,3-propyl bromide and ethyl acetoacetate as raw materials.
方法以1，3- 溴丙烷与乙酰乙酸乙酯为原料经环合、开环、溴代等反应合成。
The chemical constituents of petroleum ether fraction, chloroform fraction and ethyl acetate fraction of Flemingia philippinensis Merr. et Rolfe. were analysed by modern chromatography.
应用现代色谱技术和方法研究了千斤拔的石油醚部位、氯仿部位、乙酸乙酯部位的了化学成分。
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