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- acid ethyl oxalate 草酸氢乙酯
- The major aromas were hexylic acid ethyl ester, benzyl ethanol, octylic acid and octylic acid ethyl ester. 主体风味成分是己酸乙酯、苯乙醇、辛酸和辛酸乙酯。
- The key step in the synthesis is Wittig coupling of farnesyltriphenylphosphonium bromide (8) with ethyl 2-oxo-3-methyl butyrate (3). (3) was prepared by Grignard reaction of ethyl oxalate with iso-propylmagnesium bromide. 其中关键步骤是溴化法呢基三苯基?(8)和2-氧代-3-甲基丁酸乙酯(3)的Wittig反应。
- The major chemical constitutes in essential oil were ester and alcoho.The major chemical compound was butanoic acid ethyl ester (86.89%). 其主要成分是酯类、醇类物质，其中丁酸乙酯的相对含量高达86.;89%25。
- The major chemical constitutes in essential oil were ester and alcoho.The major chemical compound was butanoic acid ethyl ester((86.89%)). 其主要成分是酯类、醇类物质;其中丁酸乙酯的相对含量高达86.;89%25。
- The main components in ethanol-extracts are psoralen, hexadecanoic acid, hexadecanoic acid ethyl ester, bergapten, oleic acid and linoleic acid. 其乙醇提取物中以补骨脂素、十六酸、十六酸乙酯、佛手内酯、油酸、亚油酸为主。
- Internal standard method for determinating the contents of DHA and EPA in fish oil, fatty acid and fatty acid ethyl ester? 内标法测定鱼油及脂肪酸与脂肪酸乙酯中 DHA 和 EPA 含量
- In the process of Formylchloroacetic acid ethyl ester synthesis, this paper compares the variety of output by changing the lime of chemical reaction and the quantity of raw material of ethel formate. 在甲酰氯乙酸乙酯的合成过程中,通过改变反应时间及原料甲酸乙酯的投料量来比较产量的变化,以确定提高合成率的最佳条件。
- The structure of polyunsaturated fatty acid ethyl ester in fish oils were characterized by 1 H and 13C NMR, and assignment of peaks were made by means of 1H - 1H homo-nuclear shift correlation( COSY) and 1H - 13C chemical shift correlation ( HETCOR). 利用~1H、~(13)C核磁共振波谱,对鱼油多烯脂肪酸乙酯的结构进行了表征,并通过二维H-~1H相关谱(COSY)和~1H-~(13)C化学位移相关谱(HETCOR)对各共振峰进行了指认。
- By using bicycle [2. 2. 1] hept-5-ene-2, 3-dicarboxylic acid ethyl ester, benzonphe-nonetetracarboxylic acid diethyl ester and methylene dianiline as monomers and ethanol as solvent "PMR" polyimide was synthesized. 合成了以乙醇为溶剂;双环[2.;2
- The compound 8 was synthesized by 4-nitrophenyl-hydrazine and 2- oxo-propionic acid ethyl ester by nucleophilic addition, rearrangement by total yield 67.9%, and the cost was decreased. 以对硝基苯肼、丙酮酸乙酯为原料，经亲核加成、环化（2步总收率67.;9%25）合成了化合物8，降低了生产成本。
- Synthesis of New Carbamic Acid Ethyl Esters 含邻苯二甲酰亚胺基的新型胺基甲酸乙酯的合成
- Keywords gas chromatography thermal conductivity detector（TCD）;ethyl oxalate;ethyl nitrite;ethyl formiate; 气相色谱;热导检测器;草酸酯;亚硝酸乙酯;甲酸乙酯;
- 4-Aminobenzoic acid ethyl ester (Benzocaine... 4-氨基苯甲酸乙酯 /苯佐卡因/胺苯乙酯；
- coumarin -3 -carboxylic acid ethyl ester 香豆素-3-羧酸乙酯
- coumarin-3-carboxylic acid ethyl ester 香豆素-3-甲酸乙酯
- 3-oxo-hexanoic acid ethyl ester; 丁酰乙酸乙酯;3-氧代己酸乙酯;
- 3-aminobenzoic acid ethyl ester methanesulfonate; 乙基3-氨基苯甲酸酯甲烷磺酸盐;3-氨基苯甲酸乙酯甲基磺酸盐;
- Conjugated linoleic acid ethyl ester 共轭亚油酸乙酯
- methacrylic acid ethyl carbazole ester 甲基丙烯酸乙基咔唑酯
