Jørgensen K, Lefèvre J P, Mueller T C. "一种维生素B12 EP杂质D(氰钴胺素-b-一元羧酸、32-羧基氰钴胺素)的合成方法" [P]. European Patent, EP 3397386 A1, 2020-11-02.
发明人张德明,赵玉洁,徐明华. "Method for the Synthesis of Cyanocobalamin EP Impurity D(Cyanocobalamin-b-monocarboxylic acid; 32-Carboxycyanocobalamin)" [P]. 中国发明专利, 专利号 CN 108959468 B, 授权公告日 2019-11-17.
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