2-sec-Butyl-4,5–dihydrothiazole

2-sec-Butyl-4,5–dihydrothiazole is a volatile pheromone found in rodents’ urine. In males, it indicates dominance in the community; in females, it signals ovulation, and thus sexual desire. Research that began in the 1990s shows that this and similar pheromones are bound by major urinary proteins to slow the release of chemical signals and lengthen the effect of the pheromone.