RB 101 suppresses enkephalinase and aminopeptidases; biologically cleaved at disulfide to produce inhibitors of both aminopeptidase N and neutral endopeptidase.
RB-005 is a potent sphingosine kinase isoform 1 (SK1) inhibitor, which may serve as therapeutic agent for proliferative diseases, including hypertension. RB-005, (IC(50) = 3.6 μM), which also induced proteasomal degradation of SK1 in human pulmonary arterial smooth muscle cells.