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Microbial alteration of 17α(H)-hopanes in Madagascar asphalts: removal of C-10 methyl group and ring opening
Abstract The detailed investigation of the saturated hydrocarbon fractions of two biodegraded asphalts from the Morondava Basin, Madagascar, and the comparison with a related non-biodegradedExpand
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Sesquiterpene lactones from Neurolaena lobata
Abstract Eleven sesquiterpene lactones were isolated from above ground organs of Neurolaena lobata , obtained from Guatemala. Their structures were established by NMR spectroscopic methods, includingExpand
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Flavonoid Glucuronides from the Flowers of Arnica montana1.
Five flavonoid glucuronides were identified from flowers of ARNICA MONTANA L. The structures were established on the basis of total acid hydrolysis and spectral data (UV, (1)H-NMR, (13)C-NMR, mass)Expand
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[The Relative Configuration of Acetogenins Isolated from Annona squamosa: Annonin I (Squamocin) and Annonin VI].
Annonin I ( 1) and anonin VI ( 9) were isolated from the seeds of ANNONA SQUAMOSA L. (Annonaceae). The constitution of 1 is identical with that of squamocin, isolated by Fujimoto et al. (8). TheExpand
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The Structures of Sinapic Acid Esters and Their Metabolism in Cotyledons of Raphanus sativus
Five sinapic acid esters were isolated from cotyledons of Raphanus sativus and have been identified with the aid of electron impact (El)-, field desorption (FD)-mass spectrometry and NMRExpand
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Flavonoid Glycosides from Arnica montana and Arnica chamissonis.
Five flavonoid glycosides were identified from flowers of ARNICA MONTANA, four from A. CHAMISSONIS subsp. FOLIOSA var. INCANA. The structures were established on the basis of total acid hydrolysisExpand
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Diterpenes from Arnica angustifolia
From flowerheads of Arnica angustifolia ssp. attenuata the labdane diterpenes labd-13(Z)-ene-8α,15-diol (main component) and (13R,14R)8,13-epoxylabdane-14,15-diol were isolated and their structuresExpand
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Four annonins from Annona squamosa
Annonin IV, annonin VIII, annonin XIV and XVI, new linear acetogenins with hydroxylated bistetrahydrofuran moieties, and an α,β-unsaturated-γ-lactone were isolated from the seeds of Annona squamosa.Expand
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Cripowellin A and B, a novel type of amaryllidaceae alkaloid from Crinum powellii
Abstract Two novel Amaryllidaceae alkaoids named cripowellin A (1) and B (3) were isolated from bulbs of Crinum powellii. Their structures were elucidated by spectroscopic investigations andExpand
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