The condensation of 6-(benzyloxy)indolylmagnesium bromide (I) with dihalomaleimide (II) afforded the diindolylmaleimide (III), which was oxidatively cyclized to produce indolocarbazole (IV). Glycosylation of (IV) with 1-chloro-tetrabenzylglucose (V) yielded the glycosyl derivative (VI). Subsequent deprotection of the benzyl ethers of (VI) by hydrogenolysis over Pd/C gave (VII). Conversion of the imide function of (VII) to anhydride (VIII) was then effected by treatment with KOH. Finally, coupling of (VIII) with hydrazine (IX) in DMF at 80 C yielded the title compound.