Western MedicineChina Good Quality Promethazine Hydrochloride CAS 58-33-3 Promethazine HCl Promethazine Powder, Find details about China Promethiazin, CAS 58-33-3 from Good Quality Promethazine Hydrochloride CAS 58-33-3 Promethazine HCl Promethazine Powder