water
bromine
1H,1H'-2,2'-Biindolylidene-3,3'-dione
hydrogen bromide
5,7-dibromo-3-hydroxy-3-(2-oxo-2-(4-bromophenyl)ethyl)-indolin-2-one
C18H10Br3N3O
C18H11Br2N3O
2′-amino-6′-benzyl-5,7-dibromo-2,5′-dioxo-1,2,6′,7′-tetrahydro-5′H-spiro[indole-3,4′-pyrano[2,3-c]pyrrole]-3′-carbonitrile
5,7-dibromo-1-(3-fluoro-benzyl)indole-2,3-dione