1,3-Benzodioxole-5-carboxylic acid, 6-((1,3-dihydro-3-oxo-1-isobenzofuranyl)amino)- 6-((1,3-Dihydro-3-oxo-1-isobenzofuranyl)amino)-1,3-benzodioxole-5-carboxylic acid 64179-32-4