2,4,6-Trihalo-5-alkyl-and 5-alkenylsulphonylpyrimidines

2,4-diamino-(substituted-benzopyran(quinolyl,isoquinoly)methyl)p

2,4-diamino-5,6-disubstituted- and 5,6,7-trisubstituted 5-deazap

2,4-diamino-5-(1,2,3,4-tetrahydro-(substituted or unsubstituted)

2,4-Diamino-5-(4-amino and 4-dimethylamino-3,5-dimethoxy benzyl)

2,4-diamino-5-(substituted)pyrimidines, useful as antimicrobials

2,4-Diamino-5-alkyloxy-pyrimidines

2,4-Diamino-6-(hydroxymethyl)pyrido[2,3-d]pyrimidine

2,4-diamino-[4-piperidinyl]pyrimidines useful as antibacterial a

2,4-diaminopyrimidines substituted with heterobicyclomethyl radi

2,4-dioxo-3-quinazolinylaryl sulfonylureas

2,4-disubstituted pyrazine derivatives, pyrimidine derivatives,

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