以下为句子列表：
英文: A review with 44 references is given on recent development of heterocyclic azo compounds' application in spectrophotometric analysis of copper, zinc, and iron in biological sample including three kinds of heterocyclic azo compounds: pyridylazo compound, i
中文: 摘要综述了近年来应用偶氮类显色剂测定生物样品中铜、锌、铁的光度分析发展状况，从吡啶偶氮类试剂、咪唑偶氮类试剂以及三氮唑偶氮类试剂加以归纳，引用文献44篇。
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英文: B.-K. Chen, “Process for the preparation of heterocyclic diamine single-sided condensation products”, US Patent 6,818,769, Nov 16, 2004.
中文: 陈伯宽，”制造杂环双胺基化合物单边缩合反应生成物之方法”中华民国发明专利公报200422043.
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英文: By using sterically hindered, electron-rich alkylphosphines and N-heterocyclic carbenes (NHC), this process has encompassed a broad range of substrates including ketones, aldehydes, esters, amides, malonates, nitrocompounds, nitriles and sulfones.
中文: 随着大位阻、富电子烷基膦和氮杂环卡宾(NHC)为配体的催化体系的出现，该类反应的底物已从酮扩展到醛、酯、酰胺以及含酸性氢的化合物如丙二酸酯、硝基化合物、腈、砜等。
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英文: Heterocyclic quinoxalin and its derivatives are useful as highly active benzopyrazine compounds.This article introduced recent progress of these important intermediates as medicine,fungicide,pesticide,herbicide,growing inhibitors of plants,new fluororesce
中文: 喹喔啉类化合物具有众多生物活性,可用于杀菌剂、杀虫剂、除草剂、植物生长调节剂、荧光探针以及染料中间体等领域,是一类重要的杂环化合物.本文综述了喹喔啉类化合物的生物活性研究进展,探讨了不同喹喔啉衍生物的构效关系.
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英文: Many constituents are mutagens and carcinogenic such as alkenes, nitrosamines, polynuclear aromatic and heterocyclic hydrocarbons, amines .
中文: 烟草的很多成分都会引起有机体突变以及致癌,如烯烃化合物,亚硝胺,多核芳香烃以及多环碳氢化合物和铵.
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