[{"from": "human", "value": "Provide a description of this molecule. [C][C][=C][N][=C][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 4. It is a tautomer of a 2H-pyrrole and a 1H-pyrrole."}]