[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule appears as a white to yellowish powder. Toxic by skin absorption, by ingestion, and by inhalation of dust, or hydrogen cyanide produced by slight decomposition. Produces toxic oxides of nitrogen in fires."}, {"from": "gpt", "value": "[C][#Branch1][C][#N][Pb][C][#N]"}]