2,4-disubstituted-5-cyano-1,6-dihydro-6-oxo-1-pyrimidineacetic a

2,4-pyrimidinediamine compounds and their uses

2,4-Pyrimidinediamine compounds and their uses

2,4-pyrimidinediamine compounds and their uses

2,4Dioxo-5-arylidenimino-1,3-pyrimidines

2,5,6-substituted N.sub.1 -alkylpyrimidines

2,5-Di-(.omega.-aminoalkyl-1')-pyrazines

2,5-di-(4'-isocyanatobutyl)-3,6-dimethylpyrazine and a process f

2,5-dioxopiperazine compounds and method for preparing .alpha.-a

2,5-distyrylpyrazines

2,5-disubstituted pyrazine derivatives, pyrimidine derivatives,

2,5-disubstituted-4(3H)-pyrimidones having histamine H.sub.2 -re

2,6-Bis-(pyrrolopyrazinyl)pyrazines

2,6-disubstituted derivatives of 3-nitropyrazines useful as adju

2,7-Diamino-8-methyl-5-substituted pyrido{2,3-d}pyrimidin-6-ones

2-(1-Piperazinyl)-cycloheptimidazole derivatives

2-(2, 3-dihydrobenzofuran-5-yl)-4-aminomethylimidazoles:...

2-(4-Substituted-1,2,5-thiadiazole-3-yloxy)-acetaldehydes

2-(arylsulphonylamino)-pyrimidine intermediates for Azo dyes

2-(phenoxymethyl)-quinazolines as antiallergic and antiinflammat