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 | ... OPYRIMIDIN ... (8 elements)de (2) : DIAMINOPYRIMIDIN · DIAMINOPYRIMIDINE fr (2) : DIHYDROPYRIMIDINE · FORMAMIDOPYRIMIDINE |
 | ... OPYRIMIDI ... (9 elements) DIAMINOPYRIMIDIN · DIAMINOPYRIMIDINE · DIHYDROPYRIMIDINE · FORMAMIDOPYRIMIDINE · OLIGOPYRIMIDIQUE · PYRAZINOPYRIMIDINES · PYRAZOLOPYRIMIDINE ... PYRIMIDIN ... (34 elements) APYRIMIDINE · APYRIMIDINIC · DIAMINOPYRIMIDIN · DIAMINOPYRIMIDINE · DIHYDROPYRIMIDINE · FORMAMIDOPYRIMIDINE · PYRAZINOPYRIMIDINES · PYRAZOLOPYRIMIDINE · PYRIMIDIN · PYRIMIDINONES |
 | ... DIAMINOPYRIMIDIN ... (1 element) DIAMINOPYRIMIDIN ... DIAMINOPYRIMIDINE ... (1 element) DIAMINOPYRIMIDINE ... DIHYDROPYRIMIDINE ... (2 elements) DIHYDROPYRIMIDINE ... FORMAMIDOPYRIMIDINE ... (2 elements) FORMAMIDOPYRIMIDINE ... PYRAZINOPYRIMIDINES ... (1 element) PYRAZINOPYRIMIDINES ... PYRAZOLOPYRIMIDINE ... (1 element) PYRAZOLOPYRIMIDINE |