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

2-(piperazinylalkyl)-1-benzothiepin, 1-benzoxepin, and 1,5-benzo

2-(Pyridinyl)-4,5,6-pyrimidinetriamines

2-(Substituted amino)benz[cd]indoles

2-(substituted imino)-6-aryl-3,6-dihydro-4-substituted-1,5(2H)-p

2-(substituted piperazinylalkyl).beta.-carbolines useful in trea

2-4-Diamino-5-methyl-6-[(3,4,5-trimethoxyanilino)methyl]quinazol

2-Acyl-4-oxo-pyrazino-isoquinoline derivatives and process for t

2-Acylamidoethyl-2-tetrahydropyrimidines