novichok a-234 , organophosphate nerve agent, according to mirzayanov, c8h18fn2o2p molecule. structural chemical formula on the

234 a234 acetylcholinesterase agent atom atomic blue c8h18fn2o2p carbon carboxamidine chemical chemistry compound dark drawing flat formula hydrogen icon illustration mirzayanov model molecular molecule nerve nitrogen novichok organic organophosphate oxygen pesticide poison poisoning structural structure toxic vector warfare weapon white