135445-97-5 5H-1,2,4-Triazolo(3,4-i)purin-5-one, 6,7-dihydro-8-cyclopentyl-3-methyl-6-propyl- 6,7-Dihydro-3-methyl-6-n-propyl-8-cyclopentyl-5H-1,2,4-triazolo(3,4-i)purin-5-one 8-Cyclopentyl-3-methyl-6-propyl-6,7-dihydro-5H-1,2,4-triazolo(3,4-i)purin-5-one