title: AT2433-A1, AT2433-A2, AT2433-B1 and AT2433-B2 novel antitumor compounds produced by Actinomadura melliaura. II. Structure determination.
abstract: The chemical structures of AT2433-A1 (2), AT2433-A2 (3), AT2433-B1 (4) and AT2433-B2 (5) were elucidated by degradation and spectroscopic studies. Compounds 2-5 are disaccharides closely related to rebeccamycin. The aglycone in 2 and 3 was determined to be 6-N-methyl-11-chloro-5H-indolo[2,3-a]pyrolo[3,4-c]carbazole and in 4 and 5 it was determined to be 6-N-methyl-5H-indolo[2,3-a]pyrolo[3,4-c]carbazole. Compounds 2 and 4 are 4-N"-methyl analogs of 3 and 5.
authors.affiliation: Pharmaceutical Research and Development Division, Bristol-Myers Company, Wallingford, Connecticut 06492.
authors.forename: J
authors.initials: J
authors.lastname: Golik
authors.forename: T W
authors.initials: TW
authors.lastname: Doyle
authors.forename: B
authors.initials: B
authors.lastname: Krishnan
authors.forename: G
authors.initials: G
authors.lastname: Dubay
authors.forename: J A
authors.initials: JA
authors.lastname: Matson
mesh_terms: D000617:Aminoglycosides; D000900:Anti-Bacterial Agents; D000903:Antibiotics, Antineoplastic; D002227:Carbazoles; D055598:Chemical Phenomena; D002621:Chemistry; D008401:Gas Chromatography-Mass Spectrometry; D007211:Indoles
chemical_list: D000617:Aminoglycosides; D000900:Anti-Bacterial Agents; D000903:Antibiotics, Antineoplastic; D002227:Carbazoles; D007211:Indoles; C061864:AT 2433-B2; C061863:AT 2433-B1; C061862:AT 2433-A2; C061861:AT 2433-A1