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. 2014 May 5;6(5):1861–1873. doi: 10.3390/nu6051861

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© 2014 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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Structural formulae of Vitamin B₁₂ and pseudovitamin B₁₂. (1) Vitamin B₁₂ and (2) pseudovitamin B₁₂ (7-adeninyl cyanocobamide).