Azide-PEG3-Desthiobiotin is a PROTAC linker belonging to the PEG class and can be used to synthesize PROTAC molecules.

Melanotan (MT)-II, a synthetic melanocortin receptor agonist, is a synthetic analogue of the peptide hormone α-melanocyte-stimulating hormone (α-MSH).

β-Casomorphin, bovine TFA (β-Casomorphin-7 (bovine) TFA) is a opioid peptide with an IC50 of 14 μM in an Opioid receptors binding assay.