129953-23-7 Benzo(1,2-b:4,3-b')dipyrrole-2-carboxylic acid, 1,2,3,6,7,8-hexahydro-8-(bromomethyl)-4-(((dimethylamino)carbonyl)oxy)-2-methyl-1-oxo-6-((5,6,7-trimethoxy-1H-indol-2-yl)carbonyl)-, methyl ester