👉 Calixtin is a chemical compound that is used in the production of various pharmaceuticals and other medical products. It is also known as 1,2-dimethyl-4-pyridine-5-carboxamide (MDEA). Calixtin is composed of three fused pyrrolidone rings, which are linked by a hydrogen bond. It has been used in the production of various pharmaceuticals such as vaccines, antiviral drugs, and anti-inflammatory agents.