(1967)
p. 203 - 206
(2007/10/02)p. 2257 - 2269
(2007/10/02)8-methylxanthine
dimethyl sulfate
N-(6-amino-1-methyl-2,4-dioxo-1,2,3,4-tetrahydro-pyrimidin-5-yl)-N-methyl-acetamide
6-amino-1-methyl-5-(methylamino)pyrimidine-2,4-dione
6-amino-5-bromo-1-methylpyrimidine-2,4(1H,3H)-dione