1 LQQ 6-acetyl-8-cyclopentyl-5-methyl-2-[(5-piperazin-1-ylpyridin-2-yl)amino]pyrido[2,3-D]pyrimidin-7(8h)-one 1.000 2 24V 9-cyclopentyl-N-(5-piperazin-1-ylpyridin-2-yl)pyrido[4,5]pyrrolo[1,2-D]pyrimidin-2-amine 0.730