4-(Dimethylamino)-1-methylpyridinium is a monoquaternary pyridinium salt with anticholinesterase and antiproliferative activities. It inhibits cholinesterase activity in rat brain homogenates with a Kd value of 33 μM and yeast choline kinase (ChoK) with an IC50 value of 17 μM. 4-(Dimethylamino)-1-methylpyridinium also has antiproliferative activity against HT-29 colon cancer cells (IC50 = 2 μM).
4-Dimethylaminocinnamaldehyde is a photometric reagent for primary aromatic amines. The 4-(dimethylamino)cinnamaldehyde assay is currently used to quantify proanthocyanidin (PAC) content in cranberry products.