[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is an anti-diabetic drug of the biguanide class, chemically related to metformin and phenformin. It was withdrawn from the market in most countries due to a high risk of causing lactic acidosis."}, {"from": "gpt", "value": "[C][C][C][C][N][=C][Branch1][C][N][N][=C][Branch1][C][N][N]"}]