[{"from": "human", "value": "Describe this molecule. [C][=C][C][=N][C][=C][Ring1][=Branch1]"}, {"from": "gpt", "value": "The molecule is a colorless liquid with an unpleasant smell. It can be made from crude coal tar or from other chemicals. Pyridine is used to dissolve other substances. It is also used to make many different products such as medicines, vitamins, food flavorings, paints, dyes, rubber products, adhesives, insecticides, and herbicides. Pyridine can also be formed from the breakdown of many natural materials in the environment."}]