 
- 
                        Acetamide,
N-acetyl-N-(2,3,6,7-tetrahydro-3,7-dimethyl-2,6-dioxo-1H-purin-1-yl)-CAS:84728-26-7Formula:C11H13N5O4 
                     
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                        6-Pteridinecarboxylic acid,
7-amino-1,2,3,4-tetrahydro-1,3-dimethyl-2,4-dioxo-, ethyl esterCAS:93614-52-9Formula:C11H13N5O4 
                     
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                        Acetamide, N,N',N''-(3-nitroso-2,4,6-pyridinetriyl)tris-CAS:200617-91-0Formula:C11H13N5O4 
                     
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                        1H-Pyrazole-4-carboxylic acid,
5-[(1-cyano-2-ethoxy-2-oxoethylidene)hydrazino]-, ethyl esterCAS:404873-98-9Formula:C11H13N5O4 
                     
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                        6H-Purin-6-one,
2-amino-9-[(1R,4S,5S)-4,5-dihydroxy-4-(hydroxymethyl)-2-cyclopenten-
1-yl]-1,9-dihydro-CAS:661463-57-6Formula:C11H13N5O4 
                     
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                        7H-Purine-7-acetic acid,
1,6-dihydro-2-[(2-methyl-1-oxopropyl)amino]-6-oxo-CAS:861114-49-0Formula:C11H13N5O4 
                     
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                        Hydrazinecarboxamide,
N-(2-methoxyethyl)-2-[(oxido-2,1,3-benzoxadiazol-5-yl)methylene]-CAS:450382-00-0Formula:C11H13N5O4 
                     
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                        Guanosine, 2'-deoxy-N-methylene-CAS:500280-38-6Formula:C11H13N5O4 
                     
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                        1H-Pyrazole-4-carboxylic acid,
3-amino-5-[2-(2-furanylcarbonyl)hydrazino]-, ethyl esterCAS:88240-88-4Formula:C11H13N5O4 
                     
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                        Butanoic acid, 4-[[(1,6-dihydro-6-oxo-9H-purin-9-yl)acetyl]amino]-CAS:95790-10-6Formula:C11H13N5O4