1 FQN 8-[4-(1-cyclopentylpiperidin-4-yl)pyrazol-1-yl]-3~{H}-pyrido[3,4-D]pyrimidin-4-one 1.000 2 FO2 8-[4-(1-methylpiperidin-4-yl)pyrazol-1-yl]-3~{H}-pyrido[3,4-D]pyrimidin-4-one 0.786