4GRB:
reference: Structure and Property Based Design of Pyrazolo[1,5-a]pyrimidine Inhibitors of CK2 Kinase with Activity in Vivo., Dowling JE, Alimzhanov M, Bao L, Block MH, Chuaqui C, Cooke EL, Denz CR, Hird A, Huang S, Larsen NA, Peng B, Pontz TW, Rivard-Costa C, Saeh JC, Thakur K, Ye Q, Zhang T, Lyne PD, ACS Med Chem Lett. 2013 Jul 3;4(8):800-5. doi: 10.1021/ml400197u. eCollection, 2013 Aug 8. PMID: 24900749

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