title: Some long established agents--a contemporary review.
mesh_terms: D000698:Analgesia; D000769:Anesthesia, Inhalation; D000777:Anesthetics; D003521:Cyclopropanes; D004986:Ether / Q000494:pharmacology; D005018:Ethyl Chloride / Q000009:adverse effects; D006801:Humans; D009609:Nitrous Oxide; D014241:Trichloroethylene / Q000378:metabolism
chemical_list: D000777:Anesthetics; D003521:Cyclopropanes; D004986:Ether; D014241:Trichloroethylene; D005018:Ethyl Chloride; D009609:Nitrous Oxide