Taj Khan

pharmacognosy heterocyclic chemistry furan pyrrole pyridine classification of crude drugs crude dugs history of pharmacognosy present status of pharmacognosy future prospective of pharmacognosy development of pharmacognosy nomenclature fused rings bridged head heterocycles imidazole indole thiophene electrolyte replacement therapy catión electrolytes anion icf ecf sclerosing agents vericose vein nuclear medicine radiopharmaceuticals pyrimidine retrosynthesis synthon fgi expectorants emetics miscllaneous inorganic pharmaceutical agents antioxidants topical agents general chemistry protective pharmaceutical inorganic chemistry general consideration organic chemistry- heterocycles