[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][=C][C][=N][Ring1][Branch1]"}, {"from": "gpt", "value": "The molecule is that one of the three tautomers of pyrrole which has the double bonds at positions 1 and 3. It is a tautomer of a 3H-pyrrole and a 1H-pyrrole."}]