[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is often given concomitantly. Because halothane may not produce sufficient muscle relaxation, supplemental neuromuscular blocking agents may be required. (From AMA Drug Evaluations Annual, 1994, p178)"}, {"from": "gpt", "value": "[C][Branch1][=Branch2][C][Branch1][C][F][Branch1][C][F][F][Branch1][C][Cl][Br]"}]