1H-Purine-2,6-dione, 3,7-dihydro-7-(6,7-dihydroxyheptyl)-3-ethyl-1-propyl- 3,7-Dihydro-7-(6,7-dihydroxyheptyl)-3-ethyl-1-propyl-1H-purine-2,6-dione 86257-54-7