A potent and highly selective JAK3 inhibitor with IC50 of 0.15 nM.

A potent, highly specific JAK3 inhibitor with IC50 of 4 nM.

AG-490 (Tyrphostin B42) is an inhibitor of EGFR, ErbB2 and JAK2 with IC50 of 0.1 μM, 13.5 μM, and ~10 μM, respectively.

AZ 960 is a novel ATP competitive JAK2 inhibitor with IC50 and Ki of <3 nM and 0.45 nM, 3-fold selectivity of AZ960 for JAK2 over JAK3.

AZD1480 is a novel ATP-competitive JAK2 inhibitor with IC50 of 0.26 nM, selectivity against JAK3 and Tyk2, and to a smaller extent against JAK1. Phase 1/2.

Baricitinib is a selective JAK1 and JAK2 inhibitor with IC50 of 5.9 nM and 5.7 nM, ~70 and ~10-fold selective versus JAK3 and Tyk2, no inhibition to c-Met and Chk2,showed potent activity against COVID-19(SARS-COV-2).

Baricitinib phosphate(INCB 028050; LY 3009104) is a selective JAK1 and JAK2 inhibitor with IC50 of 5.9 nM and 5.7 nM, ~70 and ~10-fold selective versus JAK3 and Tyk2, no inhibition to c-Met and Chk2,showed potent activity against COVID-19(SARS-COV-2).

BMS-911543 is a potent and selective inhibitor of JAK2 with IC50 of 1.1 nM, approximately 350-, 75- and 65-fold selective to JAK1, JAK3 and TYK2, respectively.

CEP33779(< 3 μM) inhibits phosphorylation of downstream target signal transducer and activator of transcription 5(pSTAT5) of JAK2 in a concentration dependent manner in HEL92 cells.

Cerdulatinib(PRT-062070; PRT2070) is an novel oral dual Syk/JAK inhibitor.

CHZ868 is a type II JAK2 inhibitor with an IC50 of 0.17 μM in EPOR JAK2 WT Ba/F3 cell.

CYT387 is an ATP-competitive inhibitor of JAK1 and JAK2 with IC50 of 11 nM and 18 nM, respectively.

Decernotinib(VX-509; VRT-831509) is a potent and selective Janus kinase 3 (JAK3) inhibitor with Ki of 2.5 nM; IC50 is 50-170 nM in cellular assays.

Delgocitinib (JTE-052, LEO 124249) is a potent, selective, orally active, pan-JAK inhibitor with IC50 of 2.8, 2.6, 13 and 58 nM for JAK1,2,3 and Tyk2, respectively.

FM-381 is a JAK3 specific reversible covalent inhibitor with IC50 of 127 pM for JAK3 and demonstrates 400-, 2,700- and 3,600-fold selectivity over JAK1, JAK2, and TYK2, respectively.

GLPG0634 (analog) is a pan JAK inhibitor with IC50s of 50-200 nM for JAK1/JAK2/JAK3; more information can be found in the reference patents.

GPLG0634 is a novel inhibitor of JAK1 and JAK2 with IC50 of 10nM and 28nM respectively.

Itacitinib is a potent and selective inhibitor of JAK1, with >20-fold selectivity for JAK1 over JAK2 and >100-fold over JAK3 and TYK2; Itacitinib is used in the research of myelofibrosis.

JAK2 inhibitor G5-7 is a small molecule, allosteric JAK2 inhibitor that selectively inhibits JAK2-mediated phosphorylation and activation of EGFR and STAT3 by binding to JAK2.

Janex 1 selectively inhibits the tyrosine kinase activity of JAK3 with an IC50 value of 78 µM without affecting the enzymatic activity of JAK1, JAK2, or other protein tyrosine kinases (IC50 ≥350 µM).

LY2784544 is a potent JAK2 inhibitor with IC50 of 3 nM, effective in JAK2V617F, 8- and 20-fold selective versus JAK1 and JAK3. Phase 2.

Merck 5 is a potent and reversible ATP-competitive inhibitor of the JAK kinases (JAK1, JAK2, JAK3, and Tyk2). It also blocks IL2 and IL4 dependent proliferation of CTLL cells and inhibits the phosphorylation of STAT5.