8-(2-Hydroxyethylamino)theophyline

8-[(2-Hydroxyethyl)amino]theophylline

8-[(2-Hydroxyethyl)amino]-1,3-dimethyl-1H-purine-2,6(3H,7H)-dione

3,7-Dihydro-1,3-dimethyl-8-[(2-hydroxyethyl)amino]-1H-purine-2,6-dione