Changzhou Hopschain Chemical Co.,Ltd.
                            
                            Telephone0519-85528066 13775048983
                            Websitehttp://www.hopschem.com/
                         
                        
                            
                                Baimei Jihua (Henan) Pharmaceutical Technology Co., Ltd
                            
                            Telephone037188900765 18037465274
                            Websitehttp://www.baimeijihua.com
                         
                        
                            
                                Beijing xinyanhui pharmaceutical research and development co., LTD
                            
                            Telephone 13969155946
                            Websitehttps://www.chemicalbook.com/ShowSupplierProductsList710437/0_EN.htm
                         
                        
                            
                                Block Chemical Technology (Shanghai) Co., Ltd.
                            
                            Telephone021-20432219 13918097649
                            Websitehttp://www.acblock-lab.com
                         
                        
                            
                                Biosynth Biological Technology (Suzhou) Co Ltd
                            
                            Telephone 51288865780
                            Websitehttp://www.biosynth.com