15-keto Prostaglandin F2α (15-keto PGF2α) is the first metabolite of PGF2α. in the 15-hydroxy PGDH pathway. It is one of the critical components in the goldfish and Atlantic salmon postovulatory pheromone. [1] [2] 15-keto PGF2α stimulates the male goldfish and salmon olfactory receptors with detection thresholds of 10-12 and 10-8 M, respectively. [1] [2] 15-keto PGF2α is 10-fold less active than PGF2α in decreasing rabbit intraocular pressure.[3]

Reference:
[1]. Sorensen, P.W., Hara, T.J., Goetz, F.W., et al. F prostaglandins function as potent olfactory stimulants that comprise the postovulatory female sex pheromone in goldfish. Biol. Reprod. 39(5), 1039-1050 (1988).
[2]. Moore, A., and Waring, C.P. Electrophysiological and endocrinological evidence that F-series prostaglandins function as priming pheromones in mature male Atlantic salmon (Salmo salar) PARR. J. Exp. Biol. 199(Pt 10), 2307-2316 (1996).
[3]. Woodward, D.F., Williams, L.S., and Chen, J. Marked differential effects of prostanoid metabolites on rabbit intraocular pressure. Ophthalmic Res. 21(6), 428-435 (1989).