4PPC:
reference: Discovery and optimization of indazoles as potent and selective interleukin-2 inducible T cell kinase (ITK) inhibitors., Pastor RM, Burch JD, Magnuson S, Ortwine DF, Chen Y, De La Torre K, Ding X, Eigenbrot C, Johnson A, Liimatta M, Liu Y, Shia S, Wang X, Wu LC, Pei Z, Bioorg Med Chem Lett. 2014 Jun 1;24(11):2448-52. doi: 10.1016/j.bmcl.2014.04.023., Epub 2014 Apr 16. PMID: 24767842

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