1H-Imidazo(2,1-f)purine-2,4(3H,8H)-dione, 8-butyl-1,3-dimethyl-7-(4-ethylphenyl)- 8-Butyl-1,3-dimethyl-7-(4-ethylphenyl)-1H-imidazo(2,1-f)purine-2,4(3H,8H)-dione 96885-60-8 BRN 5656453