DERIVATIVES OF THE B12 COENZYME PROCESSES FOR PREPARING THEM AND PHARMACEUTICAL COMPOSITIONS CONTAINING THEM

摘要

Novel monoesters of cobamide derivatives of coenzyme B12 of the formula: IMAGE I wherein R is acyl of an organic carboxylic acid of 4 to 20 carbon atoms and Co is alpha -(5,6-dimethyl-benzimidazolyl)-cobamide which is a mixture of the said monoesters having dibencozide type properties and a process for their preparation.