98296-23-2 BRN 4629722 Benzo(1,2-b:4,3-b')dipyrrole-2-carboxylic acid, 6-((6-(aminocarbonyl)-3,6,7,8-tetrahydro-5-hydroxy-4-methoxybenzo(1,2-b:4,3-b')dipyrrol-2-yl)carbonyl)-3,6,7,8-tetrahydro-5-hydroxy-4-methoxy U 66226 U-66226