1H-PURINE-2,6-DIONE, 8-BROMO-3,7-DIHYDRO-1,3-DIMETHYL-, COMPD. WITH {N-[(4-METHOXYPHENYL)METHYL]-N',} N'-DIMETHYL-N-2-PYRIDINYL-1,2-ETHANEDIAMINE (1:1); 8-BROMO-1,3-DIMETHYL-3,9-DIHYDRO-1H-PURINE-2,6-DIONE COMPOUND WITH N~1~-(4-METHOXYBENZYL)-N~2~,N~2~-DI