Furbenicillin sodium , a known semi - synthetic ureide type of antibiotic firstly marketed in china , was synthesized from starting material 2 - furaldehyde via six steps including oximation reaction , beckmann rearrangement , isocyannuration , amination , condensation and salification etc 摘要以呋喃甲醛为起始原料，经厉化、贝克曼重排、异氰脲酸化、氨基化、缩合和成盐6步反应，合成了酰脲类青霉素抗生素呋布西林钠。
2.
Abstract : in ureide - transporting legumes ， ureides ( allantoin and allantoic acid ) are major transportform of biological fixed nitrogen . the distribution ， properties ， structure and regulation of plant allantoinase were reviewed in detail . the advances in the recent studies on allantoate amidohydrolase and ureidoglycolate amidohydrolase were introduced . and the works desired to be done were pointed out 文摘:全面综述植物酰脲降解代谢酶的研究现况，概述植物尿囊素酶的分布、性质、结构，以及调节控制，并简介植物尿囊酸酰胺水解酶和脲基乙醇酸酰胺水解酶的研究近况，同时指出待研究的方向。
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