Osteogenic Growth Peptide, OGP is a short, naturally occurring 14-mer growth factor peptide found in serum at μM concentrations. Osteogenic growth peptide OGP is a key factor in the mechanism of the systemic osteogenic response to local bone marrow injury.

4-(4-Amino-3-fluorophenoxy)-N-methylpicolinamide is an aromatic enigma that is is a metabolite of the antitumor drug rafenil.

Alexamorelin Met 1 is one of the metabolites of alexamorelin. The heptapeptide Ala-His-D-2-methyl-Trp-Ala-Trp-D-Phe-Lys-NH2 (Alexamorelin) is a synthetic molecule which inhibits growth hormone secretagogue binding in vitro.