[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is the conjugate base of ketomycolic acid type-3 (XIII). A class of mycolic acids characterized by the presence of a proximal cis C=C double bond and a distal oxo group and a (CH-CH3) fragment of (S) stereochemistry in the meromycolic chain."}, {"from": "gpt", "value": "[C][C][C@H1][Branch1][C][C][C][=Branch1][C][=O][C][/C][=C][\\C][C@H1][Branch1][O][C@@H1][Branch1][Ring1][C][C][C][=Branch1][C][=O][O-1][O]"}]