K777

Description: K777 is a potent, orally active, and irreversible inhibitor of cysteine protease, functioning as a potent CYP3A4 inhibitor (IC50 = 60 nM) and a selective CCR4 antagonist, which inhibits chemotaxis. K777 irreversibly inhibits Cruzain, the major cysteine protease of Trypanosoma cruzi, and cathepsins B and L, targeting cathepsin-mediated cell entry and exhibiting broad-spectrum antiviral activity. It inhibits EBOV and SARS-CoV pseudovirus entry with IC50 values of 0.87 nM and 0.68 nM, respectively. Target: CCR, Cysteine Protease, P450. Smiles: CN1CCN(CC1)C(=O)N[C@@H](Cc1ccccc1)C(=O)N[C@@H](CCc1ccccc1)\C=C\S(=O)(=O)c1ccccc1. References: Zhou Y, et al. Protease inhibitors targeting coronavirus and filovirus entry. Antiviral Res. 2015 Apr,116:76-84.