<unk> , also known as divinyl ether, divinyl oxide, Vinethene (pharmaceutical trade name) and ethenoxyethene (IUPAC), is a clear, nearly colorless, volatile liquid which was briefly used as an inhalation anesthetic.  It can be cyclopolymerized by itself and serves as a cross-linker in copolymerizations.
Much to the dismay of some pharmacologists, the synthesis and isolation of pure<unk>  proved to be a difficult challenge for chemists;<unk>  was suspected to be a nearly ideal anesthetic as its structure was the combination of an alkene and an ether.  In practice,<unk>  proved to have favorable properties that allowed its brief usage as an anesthetic; on the other hand, it left many unimpressed. Aggravated by the issue of potentially toxic degradation over long-term storage and possible hepatic toxicity,<unk>  began to leave the operating theater. Today,<unk>  is a relic in the field of anesthesiology; however, the analytical techniques used to study its pharmacology laid the groundwork for the testing of new anesthetic agents.
Vinyl ether
Vinyl chloride
Cyclohexane
Diethyl ether
Methyl tert-butyl ether
Ether
Isopropyl alcohol
Trichloroethylene