5h-indolo[2,3-a]pyrrolo[3,4-c]carbazole-5,7(6h)-dione, 13-[6-o-(4-amino-2,4-dideoxy-alpha-l-threo-pentopyranosyl)-4-o-methyl-beta-d-glucopyranosyl]-1-chloro-12,13-dihydro-6-methyl-