[{"from": "human", "value": "What can you tell me about this molecule? [C][O][C][Branch1][=Branch1][C][Branch1][C][Cl][Cl][Branch1][C][F][F]"}, {"from": "gpt", "value": "The molecule is rarely used for surgical, obstetric, or dental anesthesia. If so employed, it should be administered with nitrous oxide to achieve a relatively light level of anesthesia, and a neuromuscular blocking agent given concurrently to obtain the desired degree of muscular relaxation. (From AMA Drug Evaluations Annual, 1994, p180)  In the US, methoxyflurane is one of the products that have been withdrawn or removed from the market for reasons of safety or effectiveness."}]