title: Antimicrobial and antiparasitic (+)-trans-hexahydrodibenzopyrans and analogues from Machaerium multiflorum.
abstract: Machaerium multiflorum yielded two additional new (+)-trans-hexahydrodibenzopyrans (HHDBP's), machaeriol C (1) and machaeriol D (2), and three new 5,6-seco-HHDBP's, machaeridiol A (3), machaeridiol B (4), and machaeridiol C (5). Their structures and stereochemistries were determined by 1D and 2D NMR data, including HMBC, NOESY, and circular dichroism experiments. Machaeriol C (1) demonstrated in vitro antibacterial activity against Staphylococcus aureus (IC(50) 0.65 microg/mL) and methicillin-resistant S. aureus (MRSA) (IC(50) 0.70 microg/mL), while its corresponding 5,6-seco-analogues machaeridiol A (3) and machaeridiol B (4) showed antibacterial activity against S. aureus and MRSA (IC(50) 1.0-2.6 microg/mL) and antifungal activity against Candida albicans (IC(50), 2.0-3.5 microg/mL). In addition, machaeridiol B (4) demonstrated antiparasitic activities against Plasmodium falciparum D6 and W2 clones and Leishmania donavani with IC(50) values of 0.64, 0.22, and 0.9 microg/mL, respectively.
authors.affiliation: National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, MS 38677, USA. milias@sunset.backbone.olemiss.edu
authors.forename: Ilias
authors.initials: I
authors.lastname: Muhammad
authors.forename: Xing-Cong
authors.initials: XC
authors.lastname: Li
authors.forename: Melissa R
authors.initials: MR
authors.lastname: Jacob
authors.forename: Babu L
authors.initials: BL
authors.lastname: Tekwani
authors.forename: D Chuck
authors.initials: DC
authors.lastname: Dunbar
authors.forename: Daneel
authors.initials: D
authors.lastname: Ferreira
mesh_terms: D000818:Animals; D000890:Anti-Infective Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D000962:Antimalarials / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D000977:Antiparasitic Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D001578:Benzopyrans / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D002176:Candida albicans / Q000187:drug effects; D007887:Fabaceae / Q000737:chemistry*; D020128:Inhibitory Concentration 50; D007893:Leishmania donovani / Q000187:drug effects; D016106:Methicillin Resistance; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010568:Peru; D024301:Plant Bark / Q000187:drug effects; D010946:Plants, Medicinal / Q000737:chemistry*; D010963:Plasmodium falciparum / Q000187:drug effects; D013211:Staphylococcus aureus / Q000187:drug effects; D013237:Stereoisomerism
chemical_list: D000890:Anti-Infective Agents; D000962:Antimalarials; D000977:Antiparasitic Agents; D001578:Benzopyrans