This is Diane from CN SOURCE GROUP LIMITED, China. Our core business covers sourcing and supplying raw materials to customers in Pharmaceuticals, Biologicals and Extracts area. Some of our strong API products are a series of Heparin sodium, Colistin Sulphate, Doxycycline HCL, Ivermectin,Oxytetracycline Base, Oxytetracycline HCL, Oyster Shell Calcium , etc. contact me +86 31187248463,line2 at cn-source dot com