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Figure 2 from Nuclear magnetic resonance studies of the biosynthesis of vitamin B12. The origin of the methyl groups on the corrin ring. | Semantic Scholar
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The ligand system present in vitamin B12 is:a)Porphyrinb)Corrinc)Phthalocyanined)Crown etherCorrect answer is option 'B'. Can you explain this answer? | EduRev Chemistry Question
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Structural and Electronic Properties of Co-corrole, Co-corrin, and Co-porphyrin | Inorganic Chemistry
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