The four main drugs used in kenya are isoniazid , rifampicin , ethambutol and pyrazinamide . isoniazid has been on the market since 1952 , pyrazinamide is the most recent , in use since 1970 在肯雅四种结核病主要的药物，最年代久远的早于一九五二年已在?场销售，最新的也在一九七零年开始使用。
3.
The procedures can be divided to the direct and indirect methods depending on whether the ( s ) - 2 - aminobutanol intermediate be involved : the former is to obtain the chiral ethambutol directly ; the latter is to get the ( s ) - 2 - aminobutanol intermediate firstly and the final product is synthesized through n - alkyl reactions 直接法就是直接合成得到手性的乙胺丁醇；间接法是先合成乙胺丁醇的关键中间体( s ) - 2 -氨基丁醇，再通过n -烷基化反应得到最终产品。
4.
It possesses 160 workers and staff members among which there are 38 various talents from polytechnic schools , colleges and universities . this enterprise mainly manufactures simvastatin . rifampicin , rifamdin , isoniazid , pyrazinamide , ethambutol , ivermectin etc pharmaceutical intermediates and raw material medicines 本企业主要生产头孢拉定、头孢氨苄、辛伐他汀、利福平、利福定、异烟肼、异烟酸、吡嗪酰胺、乙胺丁醇、依维菌素、等医药中间体和原料药。
5.
The phase ii trial results of a gatifloxacin - containing regimen are demonstrating good potential . the regimen is significantly more potent than the currently recommended six - month regimen of isoniazid , rifampicin , pyrazinamide and ethambutol , and suggests that when gatifloxacin is used instead of ethambutol , the standard six - month regimen may be shortened to four months 这种治疗方案明显比目前建议的为期六个月的异烟肼、利福平、吡嗪酰胺和乙胺丁醇治疗方案更有效力，并表明如果用加替沙星代替乙胺丁醇，可将标准的六个月治疗方案缩短至四个月。
