7-[2-(β-Hydroxy-α-methylphenethylamino)ethyl]-3,7-dihydro-1,3-dimethyl-1H-purine-2,6-dione

3,7-Dihydro-7-[2-[(2-hydroxy-1-methyl-2-phenylethyl)amino]ethyl]-1,3-dimethyl-1H-purine-2,6-dione

7-(2-((Alphas,betar)-beta-hydroxy-alpha-methylphenethylamino)ethyl)-1,3-dimethyl-2,6(1H,3H)purindion