Warning: file_put_contents(/www/wwwroot/ppbbu/www.30232.com/cache/92d13eaf05237c4ac3682ac6928f1358.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/www.30232.com/index.php on line 55 bromobutane例句_bromobutane英汉例句_bromobutane双解例句_绍翊字体网有道词典
Bromacil was synthesized using 2-bromobutane and urea as the starting materials in three steps including condensation, cyclization and bromination with total yield of 61%. 以2-溴丁烷和尿素作为起始原料，经缩合、环化、溴代三步反应得到除草定，总收率为61%。