N-(3-chloro-2-methylphenyl)-4-(3,4-dimethyl-7-oxo-2-phenyl-2,7-dihydro-6H-pyrazolo[3,4-d]pyridazin-6-yl)butanamide

O43924 — Retinal rod rhodopsin-sensitive cGMP 3',5'-cyclic phosphodiesterase subunit delta