4-[4-(4,6-Dimethylpyrimidin-2-yl)piperazin-1-yl]-6-(pyrrolidin-1-yl)pyrimidine

7-[(3-Chlorophenyl)methyl]-1,3,9-trimethyl-4,5a-dihydropurino[8,7-c][1,2,4]triazin-5-ium-6,8-dione

1,3,9-trimethyl-7-[(E)-3-phenylprop-2-enyl]-4,5a-dihydropurino[8,7-c][1,2,4]triazin-5-ium-6,8-dione

2-[(E)-but-2-enyl]-7-tert-butyl-4-methyl-9aH-purino[8,7-b][1,3]oxazol-9-ium-1,3-dione

9-(4-Fluorophenyl)-1-methyl-3-(2-morpholin-4-ylethyl)-4a,6,7,8-tetrahydropurino[7,8-a]pyrimidin-5-ium-2,4-dione

1-[2-[4-(3-Chlorophenyl)piperazin-1-yl]ethyl]-3,4,7,9-tetramethyl-4,5a-dihydropurino[8,7-c][1,2,4]triazin-5-ium-6,8-dione

1-[(E)-but-2-enyl]-8-(3,5-dimethylpyrazol-1-yl)-3,7-dimethyl-5H-purin-7-ium-2,6-dione

8-(3,5-dimethylpyrazol-1-yl)-3,7-dimethyl-1-[(E)-3-phenylprop-2-enyl]-4,5-dihydropurine-2,6-dione

1-[(E)-but-2-enyl]-8-(3,5-dimethylpyrazol-1-yl)-7-ethyl-3-methyl-5H-purin-7-ium-2,6-dione

1,3-dimethyl-7-[(E)-3-phenylprop-2-enyl]-8-(3,4,5-trimethylpyrazol-1-yl)-5H-purin-7-ium-2,6-dione

1-[(E)-but-2-enyl]-8-(3,5-dimethylpyrazol-1-yl)-3-methyl-7-propyl-5H-purin-7-ium-2,6-dione