1-cyclopentyl-6-[[(2R)-1-(2-oxa-6-azaspiro[3.3]heptan-6-yl)-1-oxidanylidene-propan-2-yl]amino]-5H-pyrazolo[3,4-d]pyrimidin-4-one

O76083 — High affinity cGMP-specific 3',5'-cyclic phosphodiesterase 9A