isonitrosoacetone

i·so·ni·tro·so·ac·e·tone

(ī'sō-nī'trō-sō-as'ĕ-tōn),
A cholinesterase reactivator that can penetrate the blood-brain barrier readily and cause significant reactivation of phosphorylated acetylcholinesterase in the central nervous system; used to protect human beings and animals against otherwise lethal poisoning with organophosphorous anticholinesterase agents.