7-amino-1,3-diethylpyrido[2,3-d]pyrimidine-2,4-dione

1,3-二乙基-5,6-二氨基尿嘧啶

1,3-二甲基脲

1,3-diethyl-2,4,7-trioxo-1,2,3,4,7,8-hexahydropyrido[2,3-d]pyrimidine-6-carbonitrile

1,3-二乙基-5-亚硝基-6-氨基脲嘧啶