Pqqh

Pyrrolo-quinoline semiquinone

2,7,9-tricarboxypyrrolo(2,3-f)quinoline-4-ol-5-one

2,7,9-Tricarboxy-1H-pyrrolo(2,3-F)quinoline-4-one-5-ol

1H-Pyrrolo(2,3-F)quinolin-4-yloxy, 2,7,9-tricarboxy-5-hydroxy-