135446-09-2 5H-1,2,4-Triazolo(3,4-i)purin-5-one, 6,9-dihydro-9-(phenylmethyl)-6-propyl-3-(4-pyridinyl)- 6,9-Dihydro-6-n-propyl-9-benzyl-3-(4-pyridyl)-5H-1,2,4-triazolo(3,4-i)purin-5-one 9-(Phenylmethyl)-6-propyl-3-(4-pyridinyl)-6,9-dihydro-5H-1,2,4-triazolo(3,4-i)purin-5-one