Compounds containing a pyrimidine ring with an amino group at the 6th position and a carbonyl group at the 4th position.
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Pyrido[2,3-d]pyrimidine-6-carbonitrile, 1,2,3,4,5,8-hexahydro-1,3-dimethyl-2,4-dioxo-7-phenyl-5-(3,4,5-trimeth oxyphenyl)-
