Design, Synthesis, and Characterization of 4-Aminoquinazolines as Potent Inhibitors of the G Protein-Coupled Receptor Kinase 6 (GRK6) for the Treatment of Multiple Myeloma. - Uehling DE; Joseph B; Chung KC; Zhang AX; Ler S; Prakesch MA; Poda G; Grouleff J; Aman A; Kiyota T; Leung-Hagesteijn C; Konda JD; et al. (Journal of medicinal chemistry, 2021)