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Suzhou ChangTong Chemicals Co.,Ltd. is a privately owned hi-tech company with three Subordinated manufacturing bases and a biochemistry institution. All the products me manut acture and deal with are all developed by our company; The products are:Prazosin Hydrochloride;Terazosin Hydrochloride; Doxazosin Mesylate ;alfuzosin Hydrochloride;Calium Dobesilate Monohydrate; Kalium（2,5-dihydroxybenzaenesulphonate）;Etamsylate;Nicardipine Hydrochloride;RaloxifeneHydrochloride;Phenoxybenzamine Hydrochloride;Adefovir Dipivoxil;Caffeic Acid;Ferulic Acid;Sodium Ferulate;Ethyl Ferulate ;PiperazineFerulate ;4-Dimethylaminopyridine;4-Hydroxy-3-methoxy-benzoic Acid（Vanillic acid） ;3,4-Dihydroxybenzoic Acid3,4Dimethoxybenzaldehyde;HydrocinnamicAcid; Molonamide;Monosodium Fumarate; DEET; Cinnamyl amide；Methyl Malonate Monoamide Ethyl Malonate Monoamide; N-(2-Hydroxy ethyl)cinnamamide and so on.And the quality has reached the leading level of the other similar products in the world. The speciality technic of company: esterification ,condensation, sulfonation, alkylation, chlorination, hydrolyze, ammonoiysis; The working ideality of company: Credit standing is important;