Warning: file_put_contents(/www/wwwroot/zidian/oumou.cn/cache/715c2f01b350251f762a93a971ee5461.txt): failed to open stream: No space left on device in /www/wwwroot/zidian/oumou.cn/index.php on line 58 Genant例句_Genant英汉例句_Genant双解例句_欧米惠必应词典
pyridine dicarboxylic acid was prepared by using 2,6 dim ethylpyridine as material and potassium permanganate as oxy genant. 以2，6-二甲基吡啶为原料，通过高锰酸钾氧化合成了吡啶-2，6二甲酸。