93908-02-2 R4900_SIGMA 5H-Indolo(2,3-a)pyrrolo(3,4-c)carbazole-5,7(6H)-dione, 1,11-dichloro-12,13-dihydro-12-(4-O-methyl-beta-D-glucopyranosyl)- BRN 4732638 NSC 359079 Rebeccamycin AIDS045370 AIDS-045370 NChemBio.2007.20-comp20