Lotrifen (Privaprol), an agent of non-hormonal antifertility, causes the arrest and involution of pregnancy. It acts, after the implantation of the blastocyst, directly on the product of conception, which undergoes a slow and gradual degenerative process and ends with the reabsorption or expulsion of it.

PNU-282987 is a potent α7 nicotinic acetylcholine receptor (nAChR) agonist with an EC50 of 154 nM. PNU-282987 is also a functional antagonist of the 5-HT3 receptor with an IC50 of 4541 nM. PNU-282987 can be used for the research of central and peripheral nervous systems.

Egg-laying hormone (ELH) is a neuropeptide synthesized by the bag cell neurons, Egg-laying hormone (ELH) induces egg laying and its correlated behavior in Aplysia californica. Egg-laying hormone (ELH) has been purified to homogeneity and Egg-laying hormone (ELH)'s primary structure has been determined. Egg-laying hormone (ELH) have 36 amino acid residues with a Mr of 4385 and a calculated isoelectric point of 9.7. Egg Laying Hormone of Aplysia induces a voltage-dependent slow inward current carried by Na+ in an identified motoneuron.