CMF019 is a potent agonist of the Apelin receptor (APJ) with G protein bias. CMF019 binds to APJ (pKis: 8.58, 8.49, and 8.71 for the human, rat, and mouse).

D-proline is an isomer of the naturally occurring amino acid L-Proline. D-amino acids have been found in relatively high abundance in human plasma and saliva. These amino acids may be of bacterial origin but there is also evidence that they are endogenously produced through amino acid racemase activity.

δ-Amyrenone has anti-inflammatory effects and is a pentacyclic triterpenoid compound of linear streptomyces.