Synonyms: VitaminB12r (7CI); 1H-Benzimidazole, 5,6-dimethyl-1-(3-O-phosphono-a-D-ribofuranosyl)-, monoesterwith cobinamide-Co(II), inner salt; B12r; BA 2723; Co(I)-Cobalamine;Cob(2)alamin; Cob(II)alamin; Cob(II)alamin; Cobinamide-Co(1+), dihydrogenphosphate (ester), inner salt, 3'-ester with 5,6-dimethyl-1-a-D-ribofuranosyl-1H-benzimidazole;Reduced vitamin B12