| Structure | Chemical Name | CAS | MF | 
| ![4-AMINOPYRAZOLO[3,4-D]PYRIMIDINE](../cas/gif/20289-44-5.gif) | 4-AMINOPYRAZOLO[3,4-D]PYRIMIDINE | 20289-44-5 | C5H5N5 | 
|  | 6-HYDROXY-2,4,5-TRIAMINOPYRIMIDINE SULFATE | 39267-74-8 | C4H9N5O5S | 
|  | 2-CHLORO-4,5-DIAMINOPYRIMIDINE | 14631-08-4 | C4H5ClN4 | 
|  | 2,4,5,6-TETRAAMINOPYRIMIDINE | 1004-74-6 | C4H8N6 | 
|  | 4,6-Dimethoxy-2-(phenoxycarbonyl)aminopyrimidine | 89392-03-0 | C13H13N3O4 | 
|  | 2-Amino-pyrimidine-5-boronic acid | 936250-22-5 | C4H6BN3O2 | 
| ![4-Aminopyrazolo[3,4-d]pyrimidine](../cas/gif/2380-63-4.gif) | 4-Aminopyrazolo[3,4-d]pyrimidine | 2380-63-4 | C5H5N5 | 
|  | 5-Amino-4,6-dichloropyrimidine | 5413-85-4 | C4H3Cl2N3 | 
|  | Ethyl 4-amino-2-(ethylthio)-5-pyrimidinecarboxylate | 778-97-2 | C9H13N3O2S | 
|  | 4-AMINO-2-METHYLPYRIMIDINE-5-CARBONITRILE | 698-29-3 | C6H6N4 | 
|  | 2,4-DIAMINOPYRIMIDINE-5-CARBONITRILE | 16462-27-4 | C5H5N5 | 
|  | 2-Mercapto-4-hydroxy-5,6-diaminopyrimidine | 1004-76-8 | C4H6N4OS | 
|  | 2,4,5,6-Tetraaminopyrimidine dihydrochloride | 39944-62-2 | C4H9ClN6 | 
|  | 2,4,6-Triaminopyrimidine | 1004-38-2 | C4H7N5 | 
|  | 4-Methylpyrimidin-5-amine | 3438-61-7 | C5H7N3 | 
|  | 2-Amino-5-pyrimidinecarboxyaldehyde | 120747-84-4 | C5H5N3O | 
|  | 4,5-Diaminopyrimidine | 13754-19-3 | C4H6N4 | 
|  | 2-Aminopyrimidine | 109-12-6 | C4H5N3 | 
|  | 2,4-DIAMINO-6-PIPERIDINOPYRIMIDINE | 24867-26-3 | C9H15N5 | 
| ![5,6,7,8-TETRAHYDROIMIDAZO[1,2-A]PYRIMIDINE](../cas/gif/67139-2d22-4.gif) | 5,6,7,8-TETRAHYDROIMIDAZO[1,2-A]PYRIMIDINE | 67139-22-4 | C6H9N3 | 
|  | 4,5,6-TRIAMINOPYRIMIDINE | 118-70-7 | C4H7N5 | 
|  | 2,4-Dimercapto-5,6-diaminopyrimidine | 31295-41-7 | C4H6N4S2 | 
|  | 5-AMINO-4,6-DIHYDROXYPYRIMIDINE | 69340-97-2 | C4H5N3O2 | 
|  | 2,4-DIAMINO-6-ETHOXYPYRIMIDINE | 116436-03-4 | C6H10N4O | 
|  | 5-AMINO-3-PYRIDINECARBOXAMIDE | 60524-14-3 | C6H7N3O | 
|  | 5-Amino-2,6-dimethylpyrimidine | 35733-53-0 | C6H9N3 | 
|  | 4,6-DIAMINO-5-NITROPYRIMIDINE | 2164-84-3 | C4H5N5O2 | 
|  | 4-AMINO-2-(METHYLTHIO)PYRIMIDINE-5-CARBONITRILE | 770-30-9 | C6H6N4S | 
|  | 2-Aminopyrimidine-5-boronic Acid Pinacol Ester | 402960-38-7 | C10H16BN3O2 | 
|  | N-(2-Amino-4,6-dichloro-5-pyrimidinyl)formamide | 171887-03-9 | C5H4Cl2N4O | 
|  | 2,5-Diaminopyrimidine | 22715-27-1 | C4H6N4 | 
|  | 4,6-DIAMINO-2-MERCAPTOPYRIMIDINE | 1004-39-3 | C4H6N4S | 
|  | 4-AMINO-6-CHLORO-PYRIMIDINE-5-CARBALDEHYDE | 14160-93-1 | C5H4ClN3O | 
|  | 6-HYDROXY-2,4,5-TRIAMINOPYRIMIDINE | 1004-75-7 | C4H7N5O | 
| ![4-Amino-7H-pyrrolo[2,3-d]pyrimidine](../cas/gif/1500-85-2.gif) | 4-Amino-7H-pyrrolo[2,3-d]pyrimidine | 1500-85-2 | C6H6N4 | 
|  | 4-AMINO-2-(ETHYLTHIO)-5-(HYDROXYMETHYL)PYRIMIDINE | 98432-26-9 | C7H11N3OS | 
|  | 5-Isopropyl-2-pyrimidinamine | 98432-17-8 | C7H11N3 | 
|  | 4,6-Diaminopyrimidine | 2434-56-2 | C4H6N4 | 
|  | 2-(METHYLTHIO)PYRIMIDIN-4-AMINE | 2183-66-6 | C5H7N3S | 
|  | 4,5-Diaminouracil | 3240-72-0 | C4H6N4O2 | 
|  | 2,4-DIAMINO-PYRIMIDINE-5-CARBALDEHYDE | 20781-06-0 | C5H6N4O | 
|  | Pyrimidinetetramine sulfate | 5392-28-9 | C4H10N6O4S | 
|  | 4-(3-Pyridinyl)-2-aminopyrimidine | 66521-66-2 | C9H8N4 | 
|  | 4-AMINOPYRIMIDINE-5-CARBONITRILE | 16357-69-0 | C5H4N4 | 
|  | 2-Amino-4-(trifluoromethyl)pyrimidine | 16075-42-6 | C5H4F3N3 | 
|  | 4-Aminopyrimidine | 591-54-8 | C4H5N3 | 
|  | ETHYL 4-AMINO-2-(METHYLTHIO)PYRIMIDINE-5-CARBOXYLATE | 776-53-4 | C8H11N3O2S | 
|  | 5-AMINOPYRIMIDINE | 591-55-9 | C4H5N3 | 
|  | 2,4-Diaminopyrimidine | 156-81-0 | C4H6N4 | 
|  | 5-Amino-2-methyl-4(1H)-pyrimidinone | 53135-22-1 | C5H7N3O | 
|  | 4,6-dichloro-2-propylthiopyrimidine-5-amine | 145783-15-9 | C7H9Cl2N3S | 
|  | 4,6-Diamino-2-pyrimidinol | 31458-45-4 | C4H6N4O | 
|  | 2-Methoxypyrimidin-5-amine | 56621-89-7 | C5H7N3O | 
|  | 2-Aminopyrimidine-5-carbonitrile | 1753-48-6 | C5H4N4 | 
| ![Furo[2,3-d]pyrimidin-4-amine (9CI)](../cas/gif/186454-70-6.gif) | Furo[2,3-d]pyrimidin-4-amine (9CI) | 186454-70-6 | C6H5N3O | 
|  | 4-CHLORO-6-ETHYL-2-PYRIMIDINAMINE | 5734-67-8 | C6H8ClN3 | 
|  | 2,4-BIS(DIMETHYLAMINO)PYRIMIDINE-6-CARBOXYLIC ACID | 386715-39-5 | C9H14N4O2 | 
| ![7H-Pyrrolo[2,3-d]pyrimidin-4-amine sulphate](../cas/gif/769951-32-8.gif) | 7H-Pyrrolo[2,3-d]pyrimidin-4-amine sulphate | 769951-32-8 | C6H8N4O4S | 
|  | 4-Amino-2-(3-pyridyl)pyrimidine-5-carbonitrile | 175205-75-1 | C10H7N5 | 
|  | 2,4,5-TRIAMINOPYRIMIDINE | 3546-50-7 | C4H7N5 | 
|  | (4-AMINO-2-(METHYLTHIO)PYRIMIDIN-5-YL)METHANOL | 588-36-3 | C6H9N3OS | 
|  | 2-AMINO-PYRIMIDINE-5-CARBOXYLIC ACID ETHYL ESTER | 57401-76-0 | C7H9N3O2 | 
|  | 2,4-DIAMINO-6-MERCAPTOPYRIMIDINE HEMISULFATE | 81012-96-6 | C4H8N4O4S2 | 
|  | 2,4-Pyrimidinediamine, 6-ethyl- | 514854-12-7 | C6H10N4 | 
|  | 4-Pyrimidinamine, 2-methyl- (9CI) | 74-69-1 | C5H7N3 | 
| ![5H-Pyrrolo[3,2-d]pyrimidin-4-amine (9CI)](../cas/gif/2227-98-7.gif) | 5H-Pyrrolo[3,2-d]pyrimidin-4-amine (9CI) | 2227-98-7 | C6H6N4 | 
|  | 6-Chloro-N-ethylpyrimidin-4-amine | 872511-30-3 | C6H8ClN3 | 
|  | 2-(DIMETHYLAMINO)PYRIMIDINE |  | C6H9N3 | 
|  | 3-(2-Aminopyrimidin-5-yl)benzoic acid | 914349-45-4 | C11H9N3O2 | 
|  | 2-DIMETHYLAMINO-PYRIMIDINE-5-CARBOXYLIC ACID | 180283-66-3 | C7H9N3O2 | 
|  | 4-AMINO-5-CARBOXY-2-ETHYL-MERCAPTOPYRIMIDINE | 89853-87-2 | C7H9N3O2S | 
|  | 2-(4,6-DIAMINO-PYRIMIDIN-2-YLSULFANYL)-BUTYRIC ACID | 436088-61-8 | C8H12N4O2S | 
|  | 2-Pyrimidinamine, 5-ethoxy- (9CI) | 39268-74-1 | C6H9N3O | 
|  | 6-Chloro-N-isopropylpyrimidin-4-amine | 945896-32-2 | C7H10ClN3 | 
|  | 4-chloro-N-ethylpyrimidin-2-amine | 86575-65-7 | C6H8ClN3 | 
|  | 5-AMINO-2-(METHYLTHIO)PYRIMIDINE-4-CARBOXYLIC ACID | 100130-05-0 | C6H7N3O2S | 
|  | 5-Pyrimidinecarboxaldehyde, 4-amino- (8CI,9CI) | 16357-83-8 | C5H5N3O | 
|  | 2-Chloro-6-(trifluoromethyl)pyrimidin-4-amine | 85730-36-5 | C5H3ClF3N3 | 
|  | N-(2-AMINO-4,6-DICHLORO-5-PYRIMIDINYL)FORMAMIDE |  | C5H4Cl2N4O | 
|  | 4,5-DIAMINO-2-MERCAPTOPYRIMIDINE | 14623-58-6 | C4H6N4S | 
|  | 2-Cyclopropylamino-pyrimidine-4-carbaldehyde | 948549-74-4 | C8H9N3O | 
|  | 6-Chloro-N-cyclohexylpyrimidin-4-amine | 61667-11-6 | C10H14ClN3 | 
|  | ethyl 4-aminopyrimidine-5-carboxylate | 65195-35-9 | C7H9N3O2 | 
|  | 2-(4-PYRIDINYL)-4-PYRIMIDINAMINE | 61310-29-0 | C9H8N4 | 
| ![THIENO[3,2-D]PYRIMIDIN-4-AMINE](../cas/gif/16285-74-8.gif) | THIENO[3,2-D]PYRIMIDIN-4-AMINE | 16285-74-8 | C6H5N3S | 
| ![[2-[(tert-Butoxycarbonyl)amino]pyrimidin-5-yl]boronic acid](../cas2/gif/883231-2d25-2.gif) | [2-[(tert-Butoxycarbonyl)amino]pyrimidin-5-yl]boronic acid | 883231-25-2 | C9H14BN3O4 | 
|  | 5-BROMO-2-(METHYLAMINO)PYRIMIDINE | 31402-54-7 | C5H6BrN3 | 
|  | 5-CARBOXYCYTOSINE | 3650-93-9 | C5H5N3O3 | 
|  | 4-(2-AMINOPYRIMIDIN-5-YL)BENZOIC ACID | 222987-21-5 | C11H9N3O2 | 
| ![Pyrimido[4,5-d]pyrimidin-4-amine (9CI)](../cas/gif/26979-05-5.gif) | Pyrimido[4,5-d]pyrimidin-4-amine (9CI) | 26979-05-5 | C6H5N5 | 
|  | 2-BROMO-4-METHYL-5-AMINOPYRIDINE |  | C6H7BrN2 | 
|  | 2-Cyanoamino-4,6-dihydroxypyrimidine | 55067-10-2 | C5H4N4O2 | 
|  | 4-Chloro-6-(cyclopropylamino)pyrimidine | 941294-43-5 | C7H8ClN3 | 
|  | ETHYL 2-AMINO-4-PROPYLPYRIMIDINE-5-CARBOXYLATE | 127957-83-9 | C10H15N3O2 | 
|  | 5-Pyrimidinecarbonitrile,  2,4,6-triamino- | 465531-97-9 | C5H6N6 | 
|  | 2,4-DIAMINO PYRIMIDINE-3-OXIDE | 74638-76-9 | C4H6N4O | 
|  | 2-AMINO-6-CHLORO-4-PYRIMIDINOL HYDRATE, 95 | 206658-81-3 | C4H6ClN3O2 | 
|  | 4-AMINO-5-AMINOMETHYL-2-METHYLPYRIMIDINE, DIHYDROCHLORIDE | 95-02-3 | C6H10N4 | 
| ![4-Amino-7H-pyrrolo[2,3-d]pyrimidine hydrogen sulfate](../cas/gif/856600-01-6.gif) | 4-Amino-7H-pyrrolo[2,3-d]pyrimidine hydrogen sulfate | 856600-01-6 | C6H8N4 | 
|  | 6-chloro-Nmethylpyrimidin-4-amine | 65766-32-7 | C5H6ClN3 |