1H-INDOLE-2-CARBOXYLIC ACID, 3-((4'-CARBOXY(1,1'-BIPHENYL)-4-YL)METHYL)-1-METHYL 1H-Indole-2-carboxylic acid, 3-((4'-carboxy(1,1'-biphenyl)-4-yl)methyl)-1-methyl- 3-((4'-Carboxy(1,1'-biphenyl)-4-yl)methyl)-1-methyl-1H-indole-2-carboxylic acid 53924-41-7