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. 2021 Jul 20;11:14798. doi: 10.1038/s41598-021-94082-y

Table 2.

The generated IUPAC names for various tautameric forms of Guanine and Uracil.

Molecule SMILES Image IUPAC names
Guanine N=c1nc(O)c2[nH]cnc2[nH]1 graphic file with name 41598_2021_94082_Figa_HTML.gif

2-Imino-3,7-dihydropurin-6-ol

2-imino-1,7-dihydropurin-6-ol
Nc1nc(=O)c2nc[nH]c2[nH]1 graphic file with name 41598_2021_94082_Figb_HTML.gif 2-Amino-3,9-dihydropurin-6-one
Nc1nc(=O)c2[nH]cnc2[nH]1 graphic file with name 41598_2021_94082_Figc_HTML.gif

2-Amino-3,7-dihydropurin-6-one

2-amino-6,7-dihydro-3H-purin-6-one

2-amino-3,6-dihydropurin-6-one

2-amino-7H-purin-6-one
Nc1[nH]c(=O)c2[nH]cnc2n1 graphic file with name 41598_2021_94082_Figd_HTML.gif

2-Amino-1,7-dihydropurin-6-one

2-amino-1,6-dihydropurin-6-one
Nc1nc(O)c2[nH]cnc2n1 graphic file with name 41598_2021_94082_Fige_HTML.gif

2-Amino-7H-purin-6-ol

2-aminopurin-6-ol
Uracil O=c1cc[nH]c(=O)[nH]1 graphic file with name 41598_2021_94082_Figf_HTML.gif 1H-Pyrimidine-2,4-dione
Oc1ccnc(O)n1 graphic file with name 41598_2021_94082_Figg_HTML.gif Pyrimidine-2,4-diol
O=c1ccnc(O)[nH]1 graphic file with name 41598_2021_94082_Figh_HTML.gif

2-Hydroxy-1H-pyrimidin-6-one

2-hydroxypyrimidin-6-one
Oc1cc[nH]c(=O)n1 graphic file with name 41598_2021_94082_Figi_HTML.gif

4-Hydroxy-1H-pyrimidin-2-one

4-hydroxypyrimidin-2-one