4X3V:
reference: Identification of Non-nucleoside Human Ribonucleotide Reductase Modulators., Ahmad MF, Huff SE, Pink J, Alam I, Zhang A, Perry K, Harris ME, Misko T, Porwal SK, Oleinick NL, Miyagi M, Viswanathan R, Dealwis CG, J Med Chem. 2015 Dec 24;58(24):9498-509. doi: 10.1021/acs.jmedchem.5b00929. Epub , 2015 Dec 9. PMID: 26488902

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