(2Z,3E)-7'-bromo-3-(hydroxyimino)-2'-oxo-1,1',2',3-tetrahydro-2,3'-biindole-5-carboxylic acid

(2Z,3E)-7'-bromo-3-(hydroxyimino)-2'-oxo-1,1',2',3-tetrahydro-2,3'-biindole-5-carboxylic acid