1,3-Benzenedicarboxylic acid, 4-((1-ethyl-2-methyl-1H-indol-3-yl)carbonyl)- 2-((1-Ethyl-2-methylindol-3-yl)carbonyl)-1,5-benzenedicarboxylic acid 4-((1-Ethyl-2-methyl-1H-indol-3-yl)carbonyl)isophthalic acid 67697-32-9 EINECS 266-911-2