Methyl nicotinate, the methyl ester of Niacin found in alcoholic beverages, that is used as an active ingredient as a rubefacient in over-the-counter topical preparations indicated for muscle and joint pain[1].
[1]. L. Johnston, et al. Muscle and joint pain: topical anti-inflammatories and analgesics: therapeutic. Professional Nursing Today, Volume 17, Issue 1, Jan 2013, p. 4-5.