Results: The contents of the main impurities A and C met mith the requirements in BP, and the possibility that the unknown impurity were brought by hy-drolyzation or destructive oxygenation, o...

• 结果:主要杂质A和C含量达到英国药典标准,排除了原料药水解、氧化和氢化不完全引入单个未知杂质的可能。结论:高真空蒸馏然后重结晶是降低C杂质含量的可行方法。