Aglepristone is a synthetic steroidal antiprogestogen related to mifepristone and possesses some antiglucocorticoid activity. It is specifically used as an abortifacient in pregnant animals.
15(S)-15-methyl Prostaglandin F2α (15(S)-15-methyl PGF2α) has been shown to have potent uterine stimulant and abortifacient properties when administered intramuscularly to induce labor. 15(S)-15-methyl PGF2α isopropyl ester is a lipophilic analog of 15(S)-15-methyl PGF2α methyl ester, which may be hydrolyzed in vivo to the fully active free acid.
A number of 17-phenyl trinor prostaglandin F2α (17-phenyl trinor PGF2α) derivatives have been approved for the treatment of glaucoma. Of these, the unsubstituted or meta-substituted aromatic derivatives are the most potent FP receptor agonists. 17-trifluoromethylphenyl trinor PGF2α bears an aromatic ring which is reminiscent of the trifluoromethyl-phenoxy ring of travoprost ((+)-fluprostenol isopropyl ester). As an ocular hypotensive agent, it would be expected that 17-trifluoromethylphenyl trinor PGF2α would act very much like the free acid of travoprost. 17-phenyl trinor PGF2α is a potent luteolytic and abortifacient, with a potency equal to or greater than fluprostenol and cloprostenol.