China High Quality Pharmaceutical Intermediate USP/Bp/Cp Standard Doxepin Hydrochloride CAS 1229-29-4, Find details about China USP/Bp/Cp Standard Doxepin Hydrochloride, 1229-29-4 from High Quality Pharmaceutical Intermediate USP/Bp/Cp Standard Doxepin Hydrochloride CAS 1229-29-4