1H-Imidazo(2,1-f)purine-2,4-dione, 2,3,4,6,7,8-hexahydro-1,3-dimethyl-8-hydroxyethyl- 2,3,4,6,7,8-Hexahydro-1,3-dimethyl-8-hydroxyethyl-1H-imidazo(2,1-f)purine-2,4-dione 28557-24-6