Salisbury poisoning: UK experts cannot prove novichok nerve agent used on Skripals came from Russia, MoD says
'We have not identified the precise source, but we have provided the scientific info to government who have then used a number of other sources to piece together the conclusions'
諾維喬克（俄語：новичок，羅馬化：Novichok）是蘇聯在1970年代及1980年代開發的一系列神經毒劑。據稱有些衍生物的毒性可能是 VX 的五至八倍，但無法得到證實。諾維喬克屬於蘇聯「Foliant」計劃中開發的第四代化學武器，最早的名稱是K-84，後來更名為A-230。
Novichok (Russian: Новичо́к, "newcomer") is a series of nerve agents the Soviet Union and Russia developed between 1971 and 1993.[a] Russian scientists who developed the agents claim they are the deadliest nerve agents ever made, with some variants possibly five to eight times more potent than VX, and others up to ten times more potent than soman.