JAK3-IN-14 (compound 1) is a potent JAK3 inhibitor, with IC50 values of 38 and 600 nM for JAK3 and JAK2, respectively. JAK3-IN-14 shows inhibitory of IL-4 and IL-3 induced TF-1 cell proliferation, with IC50 values of 600 and 500 nM, respectively.
References:
[1]. Chen JJ, et al. Development of pyrimidine-based inhibitors of Janus tyrosine kinase 3. Bioorg Med Chem Lett. 2006 Nov 1;16(21):5633-8.