1H-Imidazo(2,1-f)purine-2,4(3H,8H)-dione, 1,7-dimethyl-8-(2-propenyl)- 1H-Imidazo(2,1-f)purine-2,4(3H,8H)-dione, 8-allyl-1,7-dimethyl- 8-Allyl-1,7-dimethyl-1H-imidazo(2,1-f)purine-2,4(3H,8H)-dione 85592-06-9