1.The order of preference of inhalant anesthetics for euthanasia is halothane, enflurane, isoflurane, sevoflurane, methoxyflurane, and desflurane, with or without nitrous oxide.
2.Sevoflurane is synthesized from aceton by vapor phase catalytic fluorination, vapor phase catalytic hydrogenation,chloridization and fluoromethylation, which gives a new synthetic method.