1-cyclopentyl-6-((1R)-1-(3-pyrimidin-2-ylazetidin-1-yl)ethyl)-1,5-dihydro-4H-pyrazolo(3,4-d)pyrimidin-4-one
1-cyclopentyl-6-((1r)-1-(3-pyrimidin-2-ylazetidin-1-yl)ethyl)-1,5-dihydro-4h-pyrazolo(3,4-d)pyrimidin-4-one