[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is an organolead compound consisting of four ethyl groups joined to a central lead atom. It derives from a hydride of a plumbane."}, {"from": "gpt", "value": "[C][C][Pb][Branch1][Ring1][C][C][Branch1][Ring1][C][C][C][C]"}]