Fig. 1From: Stability indicating high performance thin layer chromatography method development and validation for quantitative determination of tetracycline hydrochloride in tetracycline hydrochloride active pharmaceutical ingredient (API) and its dosage formsChemical structures of tetracycline hydrochloride (TC-HCl), epitetracycline HCl (4-ETC), Anhydrotetracycline hydrochloride (4-ATC) and 4-Epi-anhydrotetracycline HCl (4-EATC)Back to article page