8-[(E)-2-(3-Chlorophenyl)vinyl]-1,3-diethyl-7-methyl-3,7-dihydro- 1H-purine-2,6-dione

8-[(E)-2-(1,3-benzodioxol-5-yl)ethenyl]-1,3-diethyl-7H-purine-2,6-dione

1-苯基-1-(2-吡啶基)-3-二甲氨基丙烷马来酸盐

1,3-二乙基-7H-嘌呤-2,6(1H,3H)-二酮