title: Phenolic glycosides from Dirca palustris.
abstract: Five novel phenolic glycosides (1-5) were isolated from the MeOH extract of the dried twigs of Dirca palustris, as confirmed by their (1)H NMR, (13)C NMR, and MS data. Compounds 1-3 were not active against cyclooxygenase I (COX-I), but compound 4 (200 microg/mL) and compound 5 (125 microg/mL) showed 12.5 and 9.2% inhibition of the COX-I enzyme, respectively. Compounds 1-5 did not exhibit cyclooxygenase II (COX-II) enzyme inhibition. Compound 5 did not show any antioxidant activity using the liposome assay; however, compounds 1-4 displayed antioxidant activity at 60 microg/mL, with compound 2 being the most efficacious.
authors.affiliation: Department of Horticulture and National Food Safety and Toxicology Center, and Department of Biochemistry, Michigan State University, East Lansing, Michigan 48824, USA.
authors.forename: R S
authors.initials: RS
authors.lastname: Ramsewak
authors.forename: M G
authors.initials: MG
authors.lastname: Nair
authors.forename: D L
authors.initials: DL
authors.lastname: DeWitt
authors.forename: W G
authors.initials: WG
authors.lastname: Mattson
authors.forename: J
authors.initials: J
authors.lastname: Zasada
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D002853:Chromatography, Liquid; D002855:Chromatography, Thin Layer; D002942:Circular Dichroism; D051545:Cyclooxygenase 1; D051546:Cyclooxygenase 2; D052246:Cyclooxygenase 2 Inhibitors; D016861:Cyclooxygenase Inhibitors / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D005260:Female; D066298:In Vitro Techniques; D007527:Isoenzymes / Q000378:metabolism; D008081:Liposomes; D009682:Magnetic Resonance Spectroscopy; D008297:Male; D009656:North America; D010636:Phenols / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D010946:Plants, Medicinal / Q000737:chemistry*; D011451:Prostaglandin-Endoperoxide Synthases / Q000378:metabolism; D012669:Seminal Vesicles / Q000187:drug effects / Q000201:enzymology; D012756:Sheep; D016339:Spectrometry, Mass, Fast Atom Bombardment
chemical_list: D000975:Antioxidants; D052246:Cyclooxygenase 2 Inhibitors; D016861:Cyclooxygenase Inhibitors; D007527:Isoenzymes; D008081:Liposomes; D010636:Phenols; D051545:Cyclooxygenase 1; D051546:Cyclooxygenase 2; D011451:Prostaglandin-Endoperoxide Synthases