5-Allyl-4-hydroxy-1H-pyrimidin-6-one
5-Allylpyrimidine-4,6-diol

2-Amino-5-bromopyrimidine

4-Amino-2-chloro-5-fluoropyrimidine

4-Amino-2-chloro-5-methylpyrimidine
2-Chloro-5-methyl-pyrimidin-4-ylamine

4-Amino-2-chloropyrimidine

4-Amino-6-chloropyrimidine

5-Amino-2-chloropyrimidine

4-Amino-6-chloropyrimidine-5-carbonitrile
5-Pyrimidinecarbonitrile, 4-amino-6-chloro-

2-Amino-5-cyanopyrrolo[2,3-d]pyrimidine-4-one

2-Amino-5-fluoropyrimidine-4,6-diol
4(3H)-Pyrimidinone, 2-amino-5-fluoro-6-hydroxy-

2-Amino-4-iodo-6-methoxypyrimidine

4-Amino-2-methoxypyrimidine

6-(Aminomethyl)pyrimidin-4-amine

4-Aminomethylpyrimidine hydrochloride
4-Pyrimidinemethanamine, dihydrochloride (9CI)

6-(Aminomethyl)-1H-pyrimidin-4-one dihydrochloride
6-(Aminomethyl)-4-pyrimidinol dihydrochloride

5-Aminopyrimidine
Pyrimidin-5-ylamine

2-Aminopyrimidine-5-boronic acid

2-Aminopyrimidine-4-carboxylic acid

tert-Butyl 2-amino-5H-pyrrolo[3,4-d]pyrimidine-6(7H)-carboxylate

4-Amino-7H-pyrrolo[2,3-d]pyrimidine-2-thiol

2-(N-Anilino)pyrimidine

Azidothymidine (AZT)
Zidovudine

7-(Benzenesulfonyl)-4-chloro-6-iodo-pyrrolo[2,3-d]pyrimidine
4-Chloro-6-iodo-7-phenylsulfonyl-7H-pyrrolo[2,3-d]pyrimidine

6-Benzyl-4-chloro-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidine

7-Benzyl-4-chloro-5,6,7,8-tetrahydropyrido[3,4-d]pyrimidine HCl

6-Benzyl-2,4-dichloro-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidine

7-Benzyl-2,4-dichloro-5,6,7,8-tetrahydropyrido[3,4-d]pyrimidine

6-Benzyl-6,7-dihydro-1H-pyrrolo[3,4-d]pyrimidine-2,4(3H,5H)-dione

6-Benzyl-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidine-2,4(1H,3H)-dione

6-Benzyl-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidin-4(3H)-one

7-Benzyl-5,6,7,8-tetrahydro-3H-pyrido[3,4-d]pyrimidin-4-one

6-Benzyl-3,5,6,7-tetrahydropyrrolo[3,4-d]pyrimidin-4-one

5-Bromo-2-chloro-4-(dimethylamino)pyrimidine

5-Bromo-4-chloro-2-(methylthio)pyrimidine
Pyrimidine, 5-bromo-4-chloro-2-(methylthio)-

3-Bromo-4-chloro-1H-pyrazolo[3,4-d]pyrimidine

7-Bromo-4-chloro-pyrido[3,2-d]pyrimidine
Pyrido[3,2-d]pyrimidine, 7-bromo-4-chloro-

5-Bromo-2-chloropyrimidine

5-Bromo-4-chloro-7H-pyrrolo[2,3-d]pyrimidine

6-Bromo-4-chlorothieno[2,3-d]pyrimidine

7-Bromo-4-chlorothieno[3,2-d]pyrimidine

5-Bromo-2,4-dichloropyrimidine

5-Bromo-2,4-dimethoxypyrimidine

5-Bromo-4-N,N-dimethylamino-2-methoxypyrimidine

5-Bromo-2-ethoxypyrimidine

2-Bromo-5-fluoropyrimidine
2-Bromo-5-fluoro-1-pyrimidine

5-Bromo-2-fluoropyrimidine

5-Bromo-2-hydroxypyrimidine
5-Bromo-2(1H)-pyrimidinone,

6-Bromoimidazo[1,2-a]pyrimidine

5-Bromo-2-iodopyrimidine

5-Bromo-2-(isopropylamino)pyrimidine

5-Bromo-2-methoxypyrimidine

5-Bromo-2-methyl-pyrimidine
Pyrimidine, 5-bromo-2-methyl-

5-Bromo-2-(methylthio)pyrimidine
5-Bromo-2-methylsulfanylpyrimidine

5-Bromo-2-methylsulfanylpyrimidin-4-ol
5-Bromo-2-methylsulfanyl-3H-pyrimidin-4-one

5-Bromo-2-(methylsulphonyl)pyrimidine

5-Bromo-2-morpholin-1-yl-pyrimidine
5-Bromo-2-(N-morpholine)pyrimidine

5-Bromo-2-piperazin-1-yl-pyrimidine
5-Bromo-2-piperazine-1-yl-pyrimidine

3-Bromopyrazolo[1,5-a]pyrimidine
Pyrazolo[1,5-a]pyrimidine, 3-bromo-

6-Bromopyrazolo[1,5-a]pyrimidine
Pyrazolo[1,5-a]pyrimidine, 6-bromo-

6-Bromo-pyrazolo[1,5-a]pyrimidine-3-carboxylic acid
Pyrazolo[1,5-a]pyrimidine-3-carboxylic acid, 6-bromo-

2-Bromopyrimidine

5-Bromopyrimidine

5-bromo-pyrimidine-2-carbonitile
2-Pyrimidinecarbonitrile, 5-bromo-

4-Bromopyrimidine

5-Bromopyrimidin-4-ol
4(3H)-Pyrimidinone, 5-bromo-

7-Bromothieno[3,2-d]pyrimidine

7-Bromothieno[3,2-d]pyrimidin-4(3H)-one

5-Bromo-4-(tributylstannyl)pyrimidine

tert-Butyl 2-amino-7,8-dihydropyrido[4,3-d]pyrimidine-6(5H)-carboxylate

tert-Butyl 5-bromo-2-(methylthio)-6-oxopyrimidine-1-acetate
tert-Butyl [5-bromo-2-(methylthio)-6-oxopyrimidin-1(6H)-yl]acetate

tert-Butyl 2-chloro-7,8-dihydropyrido[4,3-d]pyrimidine-6(5H)-carboxylate

tert-Butyl 4-chloro-7,8-dihydropyrido[4,3-d]pyrimidine-6(5H)-carboxylate

tert-Butyl-4-(2-chloro-5-fluoropyrimidin-4-yl)piperidine-1-carboxylate
4-(2-Chloro-5-fluoro-pyrimidin-4-yl)-piperidine-1-carboxylic acid tert-butyl ester

tert-Butyl 4-(2-chloropyrimidin-4-yl)piperidine-1-carboxylate

tert-Butyl 2,4-Dichloro-5,6-dihydropyrido[3,4-d]pyrimidine-7(8H)-carboxylate

tert-butyl 2,4-Dichloro-7,8-dihydropyrido[4,3-d]pyrimidine-6(5H)-carboxylate

tert-butyl 2,4-Dichloro-5H-pyrrolo[3,4-d]pyrimidine-6(7H)-carboxylate

tert-Butyl 7,8-dihydro-2-(methylsulfonyl)pyrido[4,3-d]pyrimidine-6(5H)-carboxylate

tert-Butyl 4-(6-formylpyrazolo[1,5-a]pyrimidin-2-yl)piperidine-1-carboxylate
1-Piperidinecarboxylic acid, 4-(6-formylpyrazolo[1,5-a]pyrimidin-2-yl)-, 1,1-dimethylethyl ester

1-(3-tert-Butyl-5-iodo-4-methoxyphenyl)pyrimidine-2,4(1H,3H)-dione
2,4(1H,3H)-Pyrimidinedione, 1-[3-(1,1-dimethylethyl)-5-iodo-4-methoxyphenyl]-

4-Chloro-5-bromopyrimidine
Pyrimidine, 5-bromo-4-chloro-

4-Chloro-6-bromothieno[3,2-d]pyrimidine

2-Chloro-5,7-dihydro-6H-pyrrolo[2,3-d]pyrimidin-6-one

4-Chloro-5,7-dihydro-6H-pyrrolo[2,3-d]pyrimidin-6-one

7-Chloro-2,5-dimethylpyrazolo[1,5-a]pyrimidine

2-Chloro-5-fluoropyrimidine

4-Chloro-5-fluoropyrimidine

6-Chloro-5-formyl-1,3-dimethyluracil
6-Chloro-1,3-dimethyl-2,4-dioxo-1,2,3,4-tetrahydro-pyrimidine-5-carbaldehyde

4-Chlorofuro[2,3-d]pyrimidine

2-Chloro-5-hydroxypyrimidine
5-Pyrimidinol, 2-chloro-

4-Chloro-5-iodo-1H-pyrrolo[2,3-d]pyrimidine

5-Chloro-2-iodopyrimidine

2-Chloro-5-iodo-7H-pyrrolo[2,3-d]pyrimidine
7H-Pyrrolo[2,3-d]pyrimidine, 2-chloro-5-iodo-

4-Chloro-6-iodo-7H-pyrrolo[2,3-d]pyrimidine
7H-Pyrrolo[2,3-d]pyrimidine, 4-chloro-6-iodo-

4-Chloro-6-iodothieno[3,2-d]pyrimidine

4-Chloro-6-methoxypyrimidine

4-Chloro-6-methyl-2-(methylthio)pyrimidine

2-(Chloromethyl)pyrimidine
Pyrimidine, 2-(chloromethyl)-

2-Chloro-4-methylpyrimidine

2-Chloro-5-methylpyrimidine

5-(Chloromethyl)pyrimidine
Pyrimidine, 5-(chloromethyl)-

5-Chloro-6-methylpyrimidine-2,4(1H,3H)-dione
5-Chloro-6-methyl-1H-pyrimidine-2,4-dione

2-Chloro-6-methylpyrimidin-4yl-amine

4-Chloro-7-methyl-7H-pyrrolo[2,3-d]pyrimidine
7H-Pyrrolo[2,3-d]pyrimidine, 4-chloro-7-methyl-

2-Chloro-4-methylthiopyrimidine
2-Chloro-4-methylsulfanylpyrimidine

4-Chloro-2-(methylthio)pyrimidine

4-Chloro-2-(methylthio)-7H-pyrrolo[2,3-d]pyrimidine

5-Chloro-2-(methylthio)-4-(tributylstannyl)pyrimidine
5-Chloro-2-methylsulfanyl-4-tribuylstannanylpyrimidine

2-Chloro-5-nitropyrimidine

4-Chloro-2-phenyl-pyrimidine
Pyrimidine, 4-chloro-2-phenyl-

4-Chloro-7-(p-tolylsulfonyl)pyrrolo[2,3-d]pyrimidine
7H-Pyrrolo[2,3-d]pyrimidine, 4-chloro-7-[(4-methylphenyl)sulfonyl]-

4-Chloro-1H-pyrazolo[3,4-d]pyrimidine

6-Chloro-1H-pyrazolo[3,4-d]pyrimidine
1H-Pyrazolo[3,4-d]pyrimidine, 6-chloro-

4-Chloropyrido[2,3-d]pyrimidine
Pyrido[2,3-d]pyrimidine, 4-chloro-

4-Chloropyrido[3,2-d]pyrimidine
Pyrido[3,2-d]pyrimidine, 4-chloro-

6-Chloropyrido[3,2-d]pyrimidin-4(3H)-one

2-Chloropyrimidine-5-boronic acid
Boronic acid, B-(2-chloro-5-pyrimidinyl)-

2-Chloropyrimidine-4-carbonitrile

2-Chloropyrimidine-4-carboxamide

2-Chloropyrimidine-5-carboxyaldehyde
5-Pyrimidinecarboxaldehyde, 2-chloro-

2-Chloropyrimidine-4-carboxylic acid

2-Chloropyrimidine-5-carboxylic acid

4-Chloropyrimidine hydrochloride
Pyrimidine, 4-chloro-, hydrochloride

(6-Chloropyrimidin-4-yl)methanamine

4-Chloro-7H-pyrrolo[2,3-d]pyrimidin-2-amine

2-Chloro-5H-pyrrolo[3,2-d]pyrimidine
5H-Pyrrolo[3,2-d]pyrimidine, 2-chloro-

4-Chloro-5H-pyrrolo[3,2-d]pyrimidine

4-Chloro-7H-pyrrolo[2,3-d]pyrimidine

4-Chloro-7H-pyrrolo[2,3-d]pyrimidine-5-carbaldehyde
7H-Pyrrolo[2,3-d]pyrimidine-5-carboxaldehyde, 4-chloro-

4-Chloro-7H-pyrrolo[2,3-d]pyrimidine-5-carboxylic acid
7H-Pyrrolo[2,3-d]pyrimidine-5-carboxylic acid, 4-chloro-

4-Chloro-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylic acid
7H-Pyrrolo[2,3-d]pyrimidine-6-carboxylic acid, 4-chloro-

4-Chloro-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylic acid methyl ester
7H-Pyrrolo[2,3-d]pyrimidine-6-carboxylic acid, 4-chloro-, methyl ester

2-Chloro-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidine

4-Chloro-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidine HCl

4-Chlorothieno[2,3-d]pyrimidine

4-Chlorothieno[3,2-d]pyrimidine

4-Chlorothieno[3,2-d]pyrimidine-6-carboxylic acid

5-Chloro-[1,2,4]triazolo[1,5-c]pyrimidine

2-Chloro-4-(tributylstannyl)pyrimidine

4-Chloro-6-(tributylstannyl)thieno[3,2-d]pyrimidine

2-chloro-5-(tributylstannyl)pyrimidine

4-Cyano-5-bromopyrimidine
4-Pyrimidinecarbonitrile, 5-bromo-

2-Cyclopropyl-5-fluoropyrimidine-4,6-diol

2,4-Dichloro-6,7-dihydro-5H-pyrrolo[3,4-d]pyrimidine HCl

2,4-Dichloro-7,8-dihydro-5H-S,S-di-oxoisothiopyrano[4,3-d]pyrimidine

2,4-Dichloro-7,8-dihydro-5H-thiopyrano[4,3-d]pyrimidine

5,7-Dichloro-3-ethylpyrazolo[1,5-a]pyrimidine

2,4-Dichloro-5-fluoropyrimidine

4,6-Dichloro-5-fluoropyrimidine
Pyrimidine, 4,6-dichloro-5-fluoro-

2,4-Dichlorofuro[3,2-d]pyrimidine
Furo[3,2-d]pyrimidine, 2,4-dichloro-

4,6-Dichloro-5-methoxypyrimidine

2,6-Dichloro-7-methylpurine

2,4-Dichloro-5-methylpyrimidine

2,4-Dichloro-6-methylpyrimidin-5-ylamine

2,4-Dichloro-6-methyl-7H-pyrrolo[2,3-d]pyrimidine
7H-Pyrrolo[2,3-d]pyrimidine, 2,4-dichloro-6-methyl-

4,5-Dichloro-2-(methylsulfanyl)pyrimidine
Pyrimidine, 4,5-dichloro-2-(methylthio)-

2,4-Dichloro-6-methyl-thieno[3,2-d]pyrimidine
Thieno[3,2-d]pyrimidine, 2,4-dichloro-6-methyl-

4,6-Dichloro-1H-pyrazolo[3,4-d]pyrimidine

5,7-Dichloropyrazolo[1,5-a]pyrimidine

2,4-Dichloropyrido[2,3-d]pyrimidine
Pyrido[2,3-d]pyrimidine, 2,4-dichloro-

4,7-Dichloro-pyrido[2,3-d]pyrimidine
Pyrido[2,3-d]pyrimidine, 4,7-dichloro-

2,4-Dichloropyrimidine

2,5-Dichloropyrimidine

4,6-Dichloropyrimidine

2,4-Dichloro-5H-pyrrolo[3,2-d]pyrimidine

2,4-Dichloro-7H-pyrrolo[2,3-d]pyrimidine

4,5-Dichloro-7H-pyrrolo[2,3-d]pyrimidine
7H-Pyrrolo[2,3-d]pyrimidine, 4,5-dichloro-

2,4-Dichloro-5,6,7,8-tetrahydropyrido[3,4-d]pyrimidine

5,7-Dichlorothiazolo[5,4-d]pyrimidine

2,4-Dichlorothieno[3,2-d]pyrimidine

6,7-Dihydro-5H-pyrrolo[3,4-d]pyrimidine 2HCl

6,7-Dihydro-1H-pyrrolo[3,4-d]pyrimidine-2,4(3H,5H)-dione HCl

4,6-Diiodopyrimidine

2,4-Dimethoxypyrimidine-5-boronic acid

4,6-Dimethoxypyrimidine-2yl-carboxaldehyde

5-[4-[(2,3-Dimethyl-2H-indazol-6-yl)-methyl-amino]-pyrimidin-2-ylamino]-2-methyl-benzenesulfonamide
Benzenesulfonamide, 5-[[4-[(2,3-dimethyl-2H-indazol-6-yl)methylamino]-2-pyrimidinyl]amino]-2-methyl-

2,5-Dimethylpyrazolo[1,5-a]pyrimidin-7(4H)-one

2-Ethoxypyrimidine-5-boronic acid

2-Ethoxy-5-(tributylstannyl)pyrimidine

Ethyl 6-bromopyrrolo[1,2-c]pyrimidine-3-carboxylate

Ethyl 2-(1-tert-butoxycarbonyl-4-piperidyl)-7-hydroxy-pyrazolo[1,5-a]pyrimidine-6-carboxylate

Ethyl 7-chloroimidazo[1,2-c]pyrimidine-2-carboxylate

Ethyl 7-chloropyrazolo[1,5-a]pyrimidine-6-carboxylate

Ethyl 4-chloro-5H-pyrrolo[3,2-d]pyrimidine-7-carboxylate
5H-Pyrrolo[3,2-d]pyrimidine-7-carboxylic acid, 4-chloro-, ethyl ester

Ethyl 4-chloro-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylate

Ethyl 4-chlorothieno[3,2-d]pyrimidine-6-carboxylate

4-Ethyl-5-fluoropyrimidine
Pyrimidine, 4-ethyl-5-fluoro-

Ethyl 4-hydroxy-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylate

Ethyl pyrrolo[1,2-c]pyrimidine-3-carboxylate
Pyrrolo[1,2-c]pyrimidine-3-carboxylic acid ethyl ester

Ethyl 2-(5,6,7,8-tetrahydropyrido[4,3-d]pyrimidin-4-yl)acetate HCl

Ethyl 2-(5,6,7,8-tetrahydropyrido[3,4-d]pyrimidin-4-yl)acetate HCl

5-Fluoro-2-methylpyrimidine-4,6-diol
4(3H)-Pyrimidinone, 5-fluoro-6-hydroxy-2-methyl-

5-Fluoropyrimidine-2-carbonitrile
2-Pyrimidinecarbonitrile, 5-fluoro-

5-Fluoropyrimidine-4,6-diol
5-fluoro-6-hydroxy-4(3H)-Pyrimidinone

5-(Hydrazinomethyl)pyrimidine
Pyrimidine, 5-(hydrazinylmethyl)-

4-Hydrazino-1H-pyrimidin-2-one
N(4)-Aminocytosine

2-Hydroxypyrimidine-5-carboxylic acid

6-Hydroxypyrimidine-4-carboxylic acid
1,6-Dihydro-6-oxo-4-pyrimidinecarboxylic acid

5-Iodo-1,3-dimethyl-1H-pyrimidine-2,4-dione
5-Iodo-1,3-dimethyluracil

4-Iodo-6-methoxypyrimidine

4-Iodo-2-(methylthio)pyrimidine

4-Iodopyrimidine

4-Methoxypyrimidin-2-amine
2-Pyrimidinamine, 4-methoxy-

2-Methoxypyrimidine-5-boronic acid
2-Methoxy-5-pyrimidylboronic acid

2-Methoxypyrimidin-4-ol
2-Hydroxy-6-methoxypyrimidine

Methyl 3-bromo-7-azaindole-4-carboxylate
1H-Pyrrolo[2,3-b]pyridine-4-carboxylic acid, 3-bromo-, methyl ester

Methyl 5,7-dichloropyrazolo[1,5-a]pyrimidine-3-carboxylate

Methyl pyrimidine-2-carboxylate

tert-Butyl 2-methyl-5H-pyrrolo[3,4-d]pyrimidine-6(7H)-carboxylate

2-(Methylsulfonyl)-5-(tributylstannyl)pyrimidine

2-(Methylsulphonyl)pyrimidine
2-(Methylsulfonyl)pyrimidine

2-Methylthiopyrimidine
2-Methylsulfanylpyrimidine

2-(Methylthio)pyrimidine-5-boronic acid
2-(Methylthio)pyrimidin-5-ylboronic acid

2-Methylthiopyrimidin-4-ol
2-Methylsulfanylpyrimidin-4-ol

2-(Methylthio)-4-(tributylstannyl)pyrimidine

2-Methylthio-5-(tributylstannyl)pyrimidine

1H-Pyrazolo[3,4-d]pyrimidin-4-amine

Pyrazolo[1,5-a]pyrimidine-3-carboxylic acid

1H-Pyrazolo[3,4-d]pyrimidin-4-ol

Pyrido[2,3-d]pyrimidin-4(H)-one

Pyrimidine-5-boronic acid

Pyrimidine-5-boronic acid pinacol ester

5-Pyrimidinecarbonitrile
5-Cyanopyrimidine

5-Pyrimidinecarbonyl chloride
pyrimidine-5-carbonyl chloride

2-Pyrimidinecarboxaldehyde
Pyrimidine-2-carbaldehyde

Pyrimidine-5-carboxaldehyde
5-Formylpyrimidine

Pyrimidine-2-carboxylic acid

Pyrimidine-4-carboxylic acid

Pyrimidine-5-carboxylic acid
5-Pyrimidinecarboxylic acid

4-Pyrimidinecarboxylic acid, methyl ester
Methyl pyrimidine-4-carboxylate

2-Pyrimidinemethanol
2-(Hydroxymethyl)pyrimidine

4-Pyrimidinemethanol
4-(Hydroxymethyl)pyrimidine

5-Pyrimidinemethanol
5-(Hydroxymethyl)pyrimidine

Pyrimidine-2-sulfonyl fluoride

4(3H)-Pyrimidinone
4-Hydroxypyrimidine

3-(Pyrimidin-4-yl)benzoic acid

2-Aminomethylpyrimidine
2-Aminomethylpyrimidine

Pyrimidin-5-ylmethanamine
5-Aminomethylpyrimidine

7H-Pyrrolo[2,3-d]pyrimidin-4-amine
4-Amino-7H-pyrrolo[2,3-d]pyrimidine

1H-Pyrrolo[2,3-d]pyrimidine

Pyrrolo[1,2-c]pyrimidine-3-carboxylic acid

7H-Pyrrolo[2,3-d]pyrimidine-4-carboxylic acid

2-(1H-Pyrrolo[2,3-d]pyrimidin-4-yl)-1H-Isoindole-1,3(2H)-dione
1H-Isoindole-1,3(2H)-dione, 2-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)-

Stavudine
2'-3'-Didehydro-2'-3'-dideoxythymidine

5,6,7,8-Tetrahydro-4-methoxypyrido[3,4-d]pyrimidine HCl

5,6,7,8-Tetrahydro-4-methoxypyrido[4,3-d]pyrimidine HCl

5,6,7,8-Tetrahydro-4-methylpyrido[3,4-d]pyrimidine HCl

5,6,7,8-Tetrahydro-4-methylpyrido[4,3-d]pyrimidine HCl

4,5,6,7-Tetrahydropyrazolo[1,5-a]pyrimidine

5,6,7,8-Tetrahydropyrido[4,3-d]pyrimidine HCl

5,6,7,8-Tetrahydropyrido[4,3-d]pyrimidine-2,4(1H,3H)-dione HCl

5,6,7,8-Tetrahydropyrido[4,3-d]pyrimidin-4(3H)-one

5,6,7,8-Tetrahydropyrido[3,4-d]pyrimidin-4(3H)-one HCl

Thieno[3,2-d]pyrimidine-4-carboxylic acid

Thieno[3,2-d]pyrimidin-4(3H)-one
1H,4H-Thieno[3,2-d]pyrimidin-4-one

6H-[1,2,4]Triazolo[1,5-c]pyrimidin-5-one
[1,2,4]Triazolo[1,5-c]pyrimidin-5-ol

2,4,6-Tribromopyrimidine

5-Tributylstannyl-1,3-dimethyluracil
2,4(1H,3H)-Pyrimidinedione, 1,3-dimethyl-5-(tributylstannyl)-

5-(Tributylstannyl)pyrimidine