"Pyrimidine AntagonistPTNCI" . . "Chemical Viewed Functionally"^^ . "C1557"^^ . "Pyrimidine Antagonist"^^ . "An antimetabolite that affects the metabolism and utilization of pyrimidines.NCI" . "Pyrimidine_Antagonist"^^ . "Pyrimidine Antagonist"^^ . . "C0280039"^^ .