N-(3-Aminopropyl)cyclohexylamine, a cyclohexylamine derivative, acts as a selective and competitive inhibitor of spermidine synthase. N-(3-Aminopropyl)cyclohexylamine can be used for the research of neurological diseases.

Acetalin-3 (Ac-RFMWMT-NH2), a hexapeptide, is a μ opioid receptor antagonist with high affinity for μ and κ3 opioid receptor, weak affinity for κ1 receptors and no affinity for κ2 receptors.

Melanin Concentrating Hormone (MCH), a 19 amino acid cyclic peptide, is largely expressed in the hypothalamus.