alfaxalone alfentanil anatomical therapeutic chemical classification system anileridine barbiturate bioavailability biological half-life boiling point bromine cas registry number catecholamines chemical formula chloroform contraindication cyclopropane density desflurane diethyl ether digital object identifier droperidol drugbank drug metabolism enflurane esketamine ether ethylene etomidate excretion fentanyl fospropofol gamma-hydroxybutyric acid general anaesthetic haloalkane halogenated ether hepatitis hexobarbital imperial chemical industries inhalational anaesthetic isoflurane ketamine kidney liver malignant hyperthermia manchester methohexital methoxyflurane methoxypropane midazolam minaxolone minimum alveolar concentration narcobarbital neuroactive steroid nitrous oxide norepinephrine opioid phenoperidine propanidid propofol pubchem regulation of therapeutic goods remifentanil route of administration sevoflurane sodium thiopental sufentanil surgery third world thymol trichloroethylene trifluoroacetic acid vapor pressure veterinary medicine vinyl ether world health organization xenon