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. 2013 Jun 13;18(6):6936–6951. doi: 10.3390/molecules18066936

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© 2013 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Scheme 2 — Metabolic fate of isotopes during the transformation of D-glucose to the HDMF tautomers (summarized from [85]). The complete carbon chain (blue dots) of D-glucose was recovered in HDMF. Hydrogen atom (green) located in position 4 of D-glucose was lost during the transformation whereas hydrogen atom (blue) at position 2 in D-glucose was shifted to carbon 1 in HDMF. Hydrogen atoms located at position 1 (red) and 6 (pink) in D-glucose remained attached to the same carbon in HDMF.