135445-89-5 5H-1,2,4-Triazolo(3,4-i)purin-5-one, 6,9-dihydro-3-(4-(dimethylamino)phenyl)-9-methyl-6-propyl- 6,9-Dihydro-9-methyl-6-n-propyl-3-(4-dimethylaminophenyl)-5H-1,2,4-triazolo(3,4-i)purin-5-one