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Definition 2024

See also: corrín

corrin ‎(plural corrins)

(chemistry) A molecular species that contains four reduced pyrrole rings joined in a macrocycle by three -CH= groups and one direct bond; central to the cobalt containing vitamin cobalamin.
- 1998, Georgina Ferry, Dorothy Hodgkin: A Life:
  But the result showed unequivocally that the vitamin contained a ring system unlike any that had been seen before (it was later given the name ‘corrin’ ).

corrin