Found this looking up the quaalude-associated anthranilic acid formerly known as vitamin L1

From the 5′-Methylthioadenosine Wikipedia page:

Hecht found in 1937 that the body temperature of rabbits, cats and guinea pigs were lowered by 1 to 2 degrees after he gave them adenylthiomethylpentose at a dose of 0.2 g/kg. Kühn et al. replicated this in guinea pigs in 1941.

• R. Kuhn u. K. Henkel (1941). “Über die Senkung der Körpertemperatur durch Adenylthiomethylpentose”. Biological Chemistry. 269 (1): 41–46. doi:10.1515/bchm2.1941.269.1.41.

That’s a little cryptic even for Wikipedia. The source article…or part of it.