[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is an alkyl sulfate that is the mono-7-ethyl-2-methylundecan-4-yl ester of sulfuric acid. It is a conjugate base of a tetradecyl sulfate."}, {"from": "gpt", "value": "[C][C][C][C][C][Branch1][Ring1][C][C][C][C][C][Branch1][#Branch1][C][C][Branch1][C][C][C][O][S][=Branch1][C][=O][=Branch1][C][=O][O]"}]