RASP-IN-1 (compound A) is a lipophili ccompound used for macular degeneration inhibition. RASP-IN-1 is biologically active in the retina of the rabbit's eye. Thirty minutes after IP treatment with 14 C-RASP-IN-1 (10 mg/kg),the C max amount of 14 C-RASP-IN-1 in the posterior eye cup is 14.36 μg/g in mice model.