Analogues of the potent inhibitor of choline acetyltransferase (CAT)(E)-4-(l-naphthylvinyl) pyridine methiodide were synthesized and evaluated for their ability to inhibit CAT and protect against nerve agent intoxication. Several compounds, notably (E)-l-(2-hydroxyethyl)- (l-naphthylvinyl) pyridinium bromide (3),(E)-l-methyl-4-(1-naphthylviny1)-1, 2, 3, 64etrahydropyridine hydrochloride (22), and (E)-l-methyl-4-(1-naphthylviny1) piperidine ...