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Fig. 12 | Journal of Cheminformatics

Fig. 12

From: PubChem chemical structure standardization

Fig. 12

Example for a substance with the highest number of generated tautomers. Shown is SID 30283854 as it enters the step Standardize Valence Bond Form. Dashed lines indicate complex bonds as set in Verify Functional Groups. Zr and Cl ions skip valence bond canonicalization. Each one of the non-monoatomic connected components reaches the limit of 250,000 generated tautomers. In total, 1 million tautomers are generated during the standardization of this substance, with none of them being considered preferred over the original one by the standardization protocol

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