Hubei Yangxin Medical Technology Co., Ltd.
                            
                            Telephone 15374522761
                            Websitehttp://www.standardpharm.com
                         
                        
                            
                                QUALITY CONTROL SOLUTIONS LTD.
                            
                            Telephone+86-0755-66853366 +86-13670046396
                            Websitehttps://www.qcsrm.com
                         
                        
                            
                                Molcoo Chemicals Inc.
                            
                            Telephone 18576690171
                            Websitehttp://www.molcoo.com/
                         
                        
                            
                                Foshan Heshuo Pharm technology Co., ltd
                            
                            Telephone 15363639686
                            Websitehttp://www.hs-pharm.cn
                         
                        
                            
                                Hubei Qingbei Yunyan Pharmaceutical Technology Co., Ltd
                            
                            Telephone18162595016; 18162595016
                            Websitehttps://www.chemicalbook.com/supplier/25457231/
                         
                         
                            
                                ShenZhen H&D Pharmaceutical Technology Co., LTD
                            
                            Telephone+86-18126517264 18126517264
                            Websitehttps://www.hdimpurity.com/
                         
                        
                            
                                TLC Pharmaceutical Standards Ltd.
                            
                            Telephone18012923235; 18012923235
                            Websitehttp://www.tlcstandards.com
                         
                        
                            
                                Hubei Yangxin Medical Technology Co., Ltd.
                            
                            Telephone0714-3299675 13092790750
                            Websitehttps://www.yongstandards.com/
                         
                        
                            
                                Hubei YoungXin Pharmaceutical Tech Co.,Ltd.
                            
                            Telephone18696290611 18696290611
                            Websitehttp://www.yongstandards.com/
                         
                        
                            
                                ShenZhen H&D Pharmaceutical Technology Co., LTD
                            
                            Telephone +8618627948422
                            Websitehttps://www.hdimpurity.com/