135446-08-1 5H-1,2,4-Triazolo(3,4-i)purin-5-one, 6,7-dihydro-6-butyl-3-(4-pyridinyl)- 6,7-Dihydro-6-n-butyl-3-(4-pyridyl)-5H-1,2,4-triazolo(3,4-i)purin-5-one 6-Butyl-3-(4-pyridinyl)-6,7-dihydro-5H-1,2,4-triazolo(3,4-i)purin-5-one