Coenzyme structure

The chemical structure of Harden’s coenzyme was worked out in relation to nucleotides making up nucleic acids. It received the name diphosphopyridine nucleotide, and had a complex six-atom ring structure which did not occur in living tissue except in this coenzyme and its relatives.
 Hans Karl August Simon von Euler-Chelpin Germany 1923 Coenzyme structure

The chemical structure of Harden’s coenzyme was worked out in relation to nucleotides making up nucleic acids. It received the name diphosphopyridine nucleotide, and had a complex six-atom ring structure which did not occur in living tissue except in this coenzyme and its relatives.