1,2-dimethyl-1,2,3,6-tetrahydro-pyridine

1-methyl-2-[2-(4-methylphenyl)ethenyl]pyridin-1-ium,iodide

1-methyl-2-[2-(2-nitrophenyl)ethenyl]pyridin-1-ium,iodide

ethyl 2-cyano-4-(1-methylpyridin-2-ylidene)but-2-enoate

1-甲基-2-(吡啶鎓甲基)-吡啶鎓碘化物(1:2)