| Human | PDE9A | 3dys | A | | GUANOSINE-5'-MONOPHOSPHATE | | |
| Human | PDE9A | 3dys | B | | 3-ISOBUTYL-1-METHYLXANTHINE | | |
| Human | PDE9A | 3jsi | A | | 6-benzyl-1-cyclopentyl-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one | | |
| Human | PDE9A | 3jsi | B | | 6-benzyl-1-cyclopentyl-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one | | |
| Human | PDE9A | 3jsw | A | | 6-[(3S,4S)-1-benzyl-4-methylpyrrolidin-3-yl]-1-(1-methylethyl)-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one | | |
| Human | PDE9A | 3jsw | B | | 6-[(3S,4S)-1-benzyl-4-methylpyrrolidin-3-yl]-1-(1-methylethyl)-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one | | |
| Human | PDE9A | 3k3e | A | | 1-(2-chlorophenyl)-6-[(2R)-3,3,3-trifluoro-2-methylpropyl]-1,7-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one | | |
| Human | PDE9A | 3k3e | B | | 1-(2-chlorophenyl)-6-[(2R)-3,3,3-trifluoro-2-methylpropyl]-1,7-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one | | |
| Human | PDE9A | 3k3h | A | | 1-(2-chlorophenyl)-6-[(2S)-3,3,3-trifluoro-2-methylpropyl]-1,7-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one | | |
| Human | PDE9A | 3k3h | B | | 1-(2-chlorophenyl)-6-[(2S)-3,3,3-trifluoro-2-methylpropyl]-1,7-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one | | |
| Human | PDE9A | 3n3z | A | | 3-ISOBUTYL-1-METHYLXANTHINE | | |
| Human | PDE9A | 3n3z | B | | 3-ISOBUTYL-1-METHYLXANTHINE | | |
| Human | PDE9A | 3qi3 | A | | 1-(2-chlorophenyl)-6-[(2R)-3,3,3-trifluoro-2-methylpropyl]-1,7-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one | | |
| Human | PDE9A | 3qi3 | B | | 1-(2-chlorophenyl)-6-[(2R)-3,3,3-trifluoro-2-methylpropyl]-1,7-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one | | |
| Human | PDE9A | 3qi4 | A | | 3-ISOBUTYL-1-METHYLXANTHINE | | |
| Human | PDE9A | 3qi4 | B | | 3-ISOBUTYL-1-METHYLXANTHINE | | |
| Human | PDE9A | 4e90 | A | | 6-[(3S,4S)-4-methyl-1-(pyrimidin-2-ylmethyl)pyrrolidin-3-yl]-1-(tetrahydro-2H-pyran-4-yl)-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one | | |
| Human | PDE9A | 4e90 | B | | 6-[(3S,4S)-4-methyl-1-(pyrimidin-2-ylmethyl)pyrrolidin-3-yl]-1-(tetrahydro-2H-pyran-4-yl)-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one | | |
| Human | PDE9A | 4g2j | A | | 1-cyclopentyl-6-[(1R)-1-(3-phenoxyazetidin-1-yl)ethyl]-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one | | |
| Human | PDE9A | 4g2j | B | | 1-cyclopentyl-6-[(1R)-1-(3-phenoxyazetidin-1-yl)ethyl]-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one | | |
| Human | PDE9A | 4g2l | A | | 1-cyclopentyl-6-{(1R)-1-[3-(pyrimidin-2-yl)azetidin-1-yl]ethyl}-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one | | |
| Human | PDE9A | 4g2l | B | | 1-cyclopentyl-6-{(1R)-1-[3-(pyrimidin-2-yl)azetidin-1-yl]ethyl}-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one | | |
| Human | PDE9A | 4gh6 | A | | N-(4-methoxyphenyl)-N~2~-[1-(2-methylphenyl)-4-oxo-4,5-dihydro-1H-pyrazolo[3,4-d]pyrimidin-6-yl]-L-alaninamide | | |
| Human | PDE9A | 4gh6 | B | | N-(4-methoxyphenyl)-N~2~-[1-(2-methylphenyl)-4-oxo-4,5-dihydro-1H-pyrazolo[3,4-d]pyrimidin-6-yl]-L-alaninamide | | |
| Human | PDE9A | 4qge | A | | N~2~-(1-cyclopentyl-4-oxo-4,7-dihydro-1H-pyrazolo[3,4-d]pyrimidin-6-yl)-N-(4-methoxyphenyl)-D-alaninamide | | |
| Human | PDE9A | 4qge | B | | N~2~-(1-cyclopentyl-4-oxo-4,7-dihydro-1H-pyrazolo[3,4-d]pyrimidin-6-yl)-N-(4-methoxyphenyl)-D-alaninamide | | |
| Human | PDE9A | 4y86 | A | | 6-{[(1S)-1-(4-chlorophenyl)ethyl]amino}-1-cyclopentyl-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one | | |
| Human | PDE9A | 4y86 | B | | 6-{[(1R)-1-(4-chlorophenyl)ethyl]amino}-1-cyclopentyl-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one | | |
| Human | PDE9A | 4y87 | A | | 6-{[(1R)-1-(4-chlorophenyl)ethyl]amino}-1-cyclopentyl-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one | | |
| Human | PDE9A | 4y87 | B | | 6-{[(1R)-1-(4-chlorophenyl)ethyl]amino}-1-cyclopentyl-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one | | |