RLX-33 is a potent, selective and blood-brain barrier (BBB) penetrant relaxin family peptide 3 (RXFP3) antagonist, also blocks relaxin-3-induced ERK1/2 phosphorylation, with IC50 values of 2.36 μM for RXFP3, 7.82 and 13.86 μM for
[1]. https://pubmed.ncbi.nlm.nih.gov/35594150/
















