[{"from": "human", "value": "Could you provide a description of this molecule? [C][O][C][=Branch1][C][=O][C][=C][N][=C][C][=C][Ring1][=Branch1]"}, {"from": "gpt", "value": "The molecule is the methyl ester of [DB00627] that is used as an active ingredient as a rubefacient in over-the-counter topical preparations indicated for muscle and joint pain. The action of methyl nicotinate as a rubefacient is thought to involve peripheral vasodilation. For veterinary purposes, methyl nicotinate is used to treat respiratory diseases, vascular disorders, rheumatoid arthritis, and muscle and joint pains."}]