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New Sesquiterpene Lactones and Other Constituents from Centaurea paui
Aerial parts of Centaurea paui afforded, in addition to several known sesquiterpene lactones, the two new elemanolides 2–4, the new elemane derivative 5 as well as the five new heliangolides 14–18.… Expand
Sesquiterpene lactones and elemane derivatives from Onopordon myriacanthum
Abstract The aerial parts of Onopordon myriacanthum afforded, in addition to several known flavonoids and sesquiterpene lactones a new elemanolide, a new germacranolide, two new eudesmanolides and a… Expand
Polyoxygenated terpenes and cyanogenic glucosides from Centaurea aspera var. subinermis
An eudesmane, an elemane and 6′-trans-2-butenoyl ester of prunasin are described for the first time in methanol extract of Centaurea aspera var. Expand
Sesquiterpene Lactones from Centaurea achaia, a Greek Endemic Species: Antifungal Activity
Abstract The aerial parts of Centaurea achaia afforded, in addition to several known sesquiterpene lactones and sesquiterpene hydroxyesters, a new germacranolide and a new elemanolide. Their… Expand
Alcohol Oxidation by Dioxygen and Aldehydes Catalysed by Square‐Planar Cobalt(III) Complexes of Disubstituted Oxamides and Related Ligands
The square-planar cobalt(III) complexes of o-phenylenebis(N′-methyloxamidate) (Me2opba) and related oxamate (Meopba) and bis(oxamate) (opba) ligands catalyse the selective oxidation, by dioxygen and… Expand
Sesquiterpene lactones, flavonoids and coumarins from Centaurea collina
Abstract The isolation and characterization of two coumarins, five flavonoids and four sesquiterpene lactones from the aerial parts of Centaurea collina are reported. The 13 C NMR data are included.
Sesquiterpene lactones and an elemane derivative from Onopordon corymbosum
Abstract The aerial parts of Onopordon corymbosum afforded dehydromelitensin, its 8-(4-hydroxymethacryloil)-derivative and a related ester. The 13C NMR of several natural and synthetic elemanolides… Expand
Xanthone constituents of Hypericum canariensis
Lignans and flavonoids from Carduus assoi
A new lignan, 2-hydroxyolivil, has been isolated from aerial parts of Carduus assoi, together with 14 known compounds, including hispidulin 7-glucoside and luteolin 3′-rhamnoside.