title: Biologically active carbazole alkaloids from Murraya koenigii.
abstract: The bioassay guided fractionation of the acetone extract of the fresh leaves of Murraya koenigii resulted in the isolation of three bioactive carbazole alkaloids, mahanimbine (1), murrayanol (2), and mahanine (3), as confirmed from their (1)H and (13)C NMR spectral data. Compound 2 showed an IC(50) of 109 microg/mL against hPGHS-1 and an IC(50) of 218 microg/mL against hPGHS-2 in antiinflammatory assays, while compound 1 displayed antioxidant activity at 33.1 microg/mL. All three compounds were mosquitocidal and antimicrobial and exhibited topoisomerase I and II inhibition activities.
authors.affiliation: Department of Horticulture and National Food Safety and Toxicology Center, Michigan State University, East Lansing 48824, USA.
authors.forename: R S
authors.initials: RS
authors.lastname: Ramsewak
authors.forename: M G
authors.initials: MG
authors.lastname: Nair
authors.forename: G M
authors.initials: GM
authors.lastname: Strasburg
authors.forename: D L
authors.initials: DL
authors.lastname: DeWitt
authors.forename: J L
authors.initials: JL
authors.lastname: Nitiss
mesh_terms: D000330:Aedes; D000470:Alkaloids / Q000302:isolation & purification* / Q000494:pharmacology; D000818:Animals; D000900:Anti-Bacterial Agents / Q000302:isolation & purification / Q000494:pharmacology; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000302:isolation & purification / Q000494:pharmacology; D000975:Antioxidants / Q000302:isolation & purification / Q000494:pharmacology; D001419:Bacteria / Q000187:drug effects; D002227:Carbazoles / Q000302:isolation & purification* / Q000494:pharmacology; D004791:Enzyme Inhibitors / Q000302:isolation & purification / Q000494:pharmacology; D006801:Humans; D007306:Insecticides / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D010936:Plant Extracts / Q000494:pharmacology; D010946:Plants, Medicinal / Q000737:chemistry*; D059004:Topoisomerase I Inhibitors; D059005:Topoisomerase II Inhibitors
chemical_list: D000470:Alkaloids; D000900:Anti-Bacterial Agents; D000894:Anti-Inflammatory Agents, Non-Steroidal; D000975:Antioxidants; D002227:Carbazoles; D004791:Enzyme Inhibitors; D007306:Insecticides; D010936:Plant Extracts; D059004:Topoisomerase I Inhibitors; D059005:Topoisomerase II Inhibitors