Piracetam CAS NO.7491-74-9

 we have our  own factories  , shandong qingyun changxin chemical science-tech Co.,LTD .,Now It has 50000 tons of gamma butyrolactone ,50000 tons of N-methyl pyrrolidone and 10000 tons of a-pyrrolidone(a-p)combined device.Is the largest chemical entity specialized in the production and operation of gamma-butyrolactone(GBL),N-mrthyl pyrrolidone（NMP），a-pyrrolidone(a-p) and other series of products.