3,9-二氢-1,3-二丙基-1H-嘌呤-2,6-二酮

1,3-二甲基脲

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

1,3-二丙基-8-p-硫化苯基黄嘌呤

5,6-二氨基-1,3-二丙基嘧啶-2,4(1H,3H)-二酮