p. 319 - 331
(2007/10/03)7-(2-chloroethyl)-3,7-dihydro-1,3-dimethyl-1H-purine-2,6-dione
1,3-dimethyl-7-(2-phthalimido-ethyl)-3,7-dihydro-purine-2,6-dione
ethyleneimine
theophylline
N-acetyl-sulfanilic acid-[2-(1,3-dimethyl-2,6-dioxo-1,2,3,6-tetrahydro-purin-7-yl)-ethylamide]
N,N-Dimethyl-N'-<β-(7-theophyllinyl)ethyl>-N''-(2,6-dichlorophenyl)guanidine
7-(β-Guanidinoethyl)theophyllin hemisulfate
7-[2-(3-chloro-benzhydrylamino)-ethyl]-1,3-dimethyl-3,7-dihydro-purine-2,6-dione
N,N-Dimethyl-N'-<β-(7-theophyllinyl)ethyl>urea