VX (nerve agent) - Wikipedia
https://en.wikipedia.org/wiki/VX_(nerve_agent)
VX is an extremely toxic synthetic chemical compound in the organophosphorus class, specifically, a thiophosphonate. In the class of nerve agents...
Vx - Газ
http://www.rihtop.ru/DiagnoseAssistant/Substance.aspx?id=54
VX - газ Фосфорилтиохолин; Третичный тиохолиновый эфир метилоксиэтилфосфоната; Ви-газ; Ви-Экс; Ви-икс; О-этил-S-2-диизопропиламиноэтилметилфосфонат; О-изобутил-бета-N-диэтиламиноэтилтиоловый эфир метилфосфоновой кислоты
VX (nerve agent) - New World Encyclopedia
https://www.newworldencyclopedia.org/entry/VX_(nerve_agent)
VX (S-[2-(diisopropylamino)ethyl]-O-ethyl methylphosphonothioate) is an odorless, colorless, human-made chemical that is the most toxic, rapidly acting of all compounds classified as nerve agents. Not found naturally in the environment, VX's only application is in chemical warfare.