PQQ Cofactor

2,7,9-Tricarboxy-1H-Pyrrolo-(2,3-f)Quinoline-4,5-Dione; 2,7,9-Tricarboxypyrroloquinoline Quinone; 4,5-Dihydro-4,5-Dioxo-1-H-Pyrrolo(2,3-f)Quinoline-2,7,9-Tricarboxylic Acid; Coenzyme PQQ; PQQ Coenzyme; Pyrrolo-Quinoline Quinone; Pyrroloquinoline Quinone
A pyrrolo-quinoline having two adjacent keto-groups at the 4 and 5 positions and three acidic carboxyl groups. It is a coenzyme of some DEHYDROGENASES.