134106-75-5 Benzo(1,2-b:4,3-b')dipyrrole-1-carboxylic acid, 3,6,7,8-tetrahydro-8-(bromomethyl)-4-(((dimethylamino)carbonyl)oxy)-2-methyl-6-((5,6,7-trimethoxy-1H-indol-2-yl)carbonyl)-, methyl ester