Main Reaction: Precorrin-5 >> Precorrin-6

Reference: PubMed ID: 9331403
Authors: Santander PJ, Roessner CA, Stolowich NJ, Holderman MT, Scott AI
Title: How corrinoids are synthesized without oxygen: nature's first pathway to vitamin B12.
Published: 1997 Sep

Precorrin-5 --> Precorrin-6