5HHW:
reference: Identification of a 5-[3-phenyl-(2-cyclic-ether)-methylether]-4-aminopyrrolo[2,3-d]pyrimidine series of IGF-1R inhibitors., Stauffer F, Cowan-Jacob SW, Scheufler C, Furet P, Bioorg Med Chem Lett. 2016 Apr 15;26(8):2065-7. doi: 10.1016/j.bmcl.2016.02.074. , Epub 2016 Feb 26. PMID: 26951750

This OCA Structure page
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