ML221 is a potent apelin /APJ functional antagonist, inhibiting apelin-13-mediated activation of APJ, with IC50s of 0.70 μM in the cAMP assay, and 1.75 μM in the β-arrestin assay, and EC80 of 10 nM in both assays.

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).

ELA-11 (human) acetate high affinity apelin receptor agonist (Ki = 14 nM). Bioactive fragment of ELA-32. Inhibits forskolin-induced cAMP production and stimulates β-arrestin recruitment in vitro.

(2R,3S)-N-(4-(2,6-dimethoxyphenyl)-5-(5-methylpyridin-3-yl)-4H-1,2,4-triazol-3-yl)-3-(5-methylpyrimidin-2-yl)butane-2-sulfonamide is an Apelin receptor agonist with an EC50 for Apelin receptors of 0.012 µM.(2R,3S)-N-(4-(2,6-dimethoxyphenyl)-5-(5-methylpyridin-3-yl)-4H-1,2,4-triazol-3-yl)-3-(5- methylpyrimidin-2-yl)butane-2-sulfonamide is used in the treatment of heart failure, atherosclerosis, obesity, diabetes mellitus, amyotrophic lateral sclerosis, coronary artery disease, hypertension, stroke and myocardial infarction.

ELA-14(human) acetate is a fragment of ELA that binds to APJ, activates the Gαi1 and β-arrestin-2 signaling pathways, and induces receptor internalization similarly to its parent endogenous peptide.