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The article presents a study on synthetic protocols for the synthesis of some sulfonamides based on 2,3-dihydro-1 H-pyrrolo[3,4- c]pyridine. Topics discussed include preparation of pyrrolo[3,4-c]-pyrine derivatives containing oxo groups at definite positions of pyrrole part of the molecule, how 3-Oxypyrrolol[3,4-c]pyridines were prepared, and structures of synthesized compounds.