Purity ~98% (HPLC). A cell-permeable, non-toxic aminopyrazolocarbonitrile compound that acts as a potent, selective, reversible and cAMP-independent activator of CFTR-dependent Cl- channel in airway epithelial cells (EC50 = 1.6uM in CFTR-expressing Fisher rat thyroid cells). Also shown to activate deltaF508-CFTR in primary CF-HBE cell cultures (EC50 = 3.5uM). Reported to directly bind to the same site as CFTRinh-172. Does neither elevate intracellular cAMP levels nor appear to have any requirement for cAMP agonist, such as forskolin. Shown to additively potentiate the G551D-CFTR Cl- current activated by forskolin with CFTR potentiator, VX-770. Exerts no effect on either Ca2+-activated Cl- channel (TMEM16A) or intracellular Ca2+ levels. Solubility: DMSO Primary Target: CFTR