5Z-7-Oxozeaenol (FR148083) is a potent, irreversible and selective inhibitor of transforming growth factor (TGF)-β-activated kinase 1 with IC50 of 8.1 nM for TAK1 and low activity against MEK1 with IC50 of 411 nM, it is also an inhibitor of VEGF-R2 with IC50 of 52 nM.

TAK1:8.1 nM, MEK1:411 nM, VEGFR2:52 nM, PDGFRβ:340 nM, VEGFR3:110 nM, FLT3:170 nM, B-Raf (VE):6300 nM, Src:6600 nM

5Z-7-Oxozeaenol is a natural anti-protozoan compound from the fungal origin with inhibitory activity against VEGF-R3, FLT3, PDGFR-β, B-RAF VE, and SRC with IC50s of 110, 170, 340, 6300, and 6600 nM, respectively[1]. 5Z-7-Oxozaeenol inhibited PMA-induced AP-1 activity to almost basal levels in KT cells but had no effect on IL-1-induced NF-kB activity in KK cells[2]. 5Z-7-Oxozaeenol inhibits the JNK/p38 pathway, but it is not a direct inhibitor and is signal-specific. 5Z-7-Oxozaeenol prevents inflammation by inhibiting the catalytic activity of the TAK1 MAPK kinase[3].