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  • 1
    ISSN: 1618-0860
    Keywords: Keywords: Ancient polyploidy, Asteraceae, Chloroplast DNA, Diploidization, Dysploidy, Eupatorieae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Neomirandea (x=17 and 25), Ageratina (x=17) and Sclerolepis (x=15) with the higher chromosome base numbers, and the other includes Mikania (x=17) and the remaining genera with lower chromosome base numbers (x=10–11). However, the monophyly of the former clade is supported with a low bootstrap value. In the latter clade, Mikania (x=17) diverged first, then Stevia (x=11), and finally eight genera with x=10 diverged in succession. This result supports the hypothesis that the genera in the tribe Eupatorieae with x =10 evolved from an ancestor with a higher base number, and the tribe is of polyploid origin.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1983 (1983), S. 1455-1458 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A New Type of Sesquiterpene Lactones from Lychnophora sallicifoliaFrom the polar fractions of Lychnophora salicifolia two new sesquiterpene lactones were isolated, the structures of which have been elucidated by high field 1H-NMR spectroscopy and by partial synthesis of one of the epimeric lactones which are derived from caryophyllene.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1983 (1983), S. 2045-2048 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A Further Germacranolide with a β-Lactone Ring from Grazielia serrataThe reinvestigation of the aerial parts of Grazielia serrata afforded in addition to compounds isolated previously two germacranolides, 8β-angeloyloxy-9β-hydroxycostunolide and a further germacranolide with a β-lactone ring. The structure - 8β-tiglioyloxygrazielolide (1) - was elucidated by spectroscopic methods and by chemical transformation into the trans,trans-cyclodecadiene derivative 3.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1983 (1983), S. 2127-2134 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: New Ladbane Derivatives from Aristeguietia pseudoarboreaThe investigation of the aerial parts of Aristeguietia pseudoarborea afforded in addition to widespread compounds five new labdane derivatives the structures of which have been elucidated by spectroscopic methods and a few chemical transformations. The absolute configuration could be deduced from the positive Cotton effect of a ketone which was obtained by partial acetylation and oxidation of the main constituent.
    Notes: Die Untersuchung der oberirdischen Teile von Aristeguietia pseudoarborea ergab neben weitverbreiteten Verbindungen fünf neue Labdan-Derivate, deren Strukturen durch spektroskopische Methoden und einige chemische Umwandlungen geklärt wurden. Die absolute konfiguration wurde aus dem positiven Cotton-Effekt eines Ketons abgeleitet, das durch partielle Acetylierung und Oxidation der Hauptverbindung erhalten wurde.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Naturally Occurring Terpene Derivatives, 2922).  -  The First Sesquiterpene Lactone with an Allenic GroupHerrn Prof. Dr. K. Dimroth zum 70. Geburtstag gewidmet.In addition to some known triterpenes, from the aerial parts of Vernonia cotoneaster Less, was isolated the sesquiterpene lactone vernonallenoid (4) which most probably is the first allenic derivative in this series.
    Notes: Neben einigen bekannten Triterpenen isoliert man aus den oberirdischen Teilen von Vernonia cotoneaster Less, das Sesquiterpenlacton Vernonallenoid (4), bei dem es sich um das erste Allenderivat in dieser Reihe handeln dürfte.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1983 (1983), S. 714-716 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Polyacetylenic Compounds, 266. - New C17 Acetylenic Compounds from Solidugo spathulata DCThe roots of Solidago spathulata afforded two C17 acetylenic compounds biogenitically closely related to those from S. virgaurea.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1983 (1983), S. 1257-1266 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Steiractinolides from Aspilia and Wedelia SpeciesThe reinvestigation of the polar fractions of Aspilia parvifolia afforded eight further steiractinolides and one geranylgeraniol derivative. The aerial parts of a new Wedelia species gave three derivatives of 4,5-dihydrosteiractinolides. The structures were elucidated by detailed 1H NMR studies. The configurations of some eudesmanolides from Wedelia trilobata were corrected and the absolute configuration of the steiractinolides has been determined by using the Horeau method.
    Notes: Die erneute Untersuchung der polaren Fraktionen von Aspilia parvifolia ergibt acht weitere Steiractinolide und ein Geranylgeraniol-Derivat. Die oberirdischen Teile einer neuen Wedelia-Art liefern drei Derivate von 4,5-Dihydrosteiractinolid. Die Strukturen werden durch eingehende 1H-NMR-Untersuchungen geklärt. Die Konfigurationen einiger Eudesmanolide aus Wedelia trilobata werden korrigiert, und die absolute Konfiguration der Steiractinolide wird mit Hilfe der Horeau-Methode bestimmt.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: New Spirosesquiterpenelactones, Germacranolides, and Eudesmanolides from Wunderlichia mirabilisA reinvestigation of the aerial parts of Wunderlichia mirabilis afforded in addition to known compounds ten sesquiterpenelactones, three cis-12,6-germacranolides (7-9), three eudesmanolides (11, 13 and 14), an elemanolide (12) which may be an artifact, and three rearranged eudesmanolides, the spiro compounds 17-19 as well as ylangenyl acetate (1). The structures were elucidated by high-field 1H NMR spectroscopy and some chemical transformations. The stereochemistry of wunderolide (10) and of two onoseriolide (24 and 25) derivatives, which were isolated previously, are corrected.
    Notes: Eine erneute Untersuchung der oberirdischen Teile ovn Wunderlichia mirabilis ergibt zusätzlich zu bekannten Verbindungen zehn Sesquiterpenlactone, drei cis-12,6-Germacranolide (7-9), drei Eudesmanolide (11, 13 und 14), ein Elemanolid (12), das ein Artefact sein könnte, und drei umgelagerte Eudesmanolide, die Spiroverbindungen 17-19 sowie Ylangenylacetat (1). Die Strukturen werden durch Hochfeld-1H-NMR-Spektroskopie und einige chemische Umwandlungen geklärt. Die Stereochemie von Wunderolid (10) und von zwei Onoserioliden (24 und 25), die früher isoliert wurden, wird korrigiert.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1984 (1984), S. 240-249 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: New Germacranolides, Heliangolides, and Elemanolides from Cronquistianthus chachapoyensisThe aerial parts of Cronquistianthus chachapoyensis afforded in addition to some known compounds eight new sesquiterpenelactons, the germacranolide acids 1 and 2 and the closely related elemanolides 5 and 6, the germacranolides 7 and 9 as well as the heliangolides 13 and 15 which only could be isolated as their acetates (8, 10, 14, and 16). The structures were elucidated by spectroscopic methods and some chemical transformations.
    Notes: Die oberirdischen Teile von Cronquistiathus chachapoyensis ergeben neben einigen bekannten Verbindungen acht neue Sesquiterpenlactone, die Germacranolidsäuren 1 und 2 und die nahe verwandten Elemanolide 5 und 6, die Germacranolide 7 und 9 sowie die Heliangolide 13 und 15, die nur als Acetate isoliert werden konnten (8, 10, 14 und 16). Die Strukturen werden durch spektroskopische Methoden und einige chemische Umwandlungen erklärt.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1984 (1984), S. 250-258 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Epoxycannabinolide and Diterpenes with a New Carbon Skeleton from Villanova titicaensisThe aerial parts of Villanova titicaensis afforded in addition to known compounds the new heliangolide 5 and several diterpenes (11-16) with a so far not observed molecular skeleton which is related to helifulvane. The structures were elucidated by spectroscopic methods and by chemical transformations of the diterpenes. The chemotaxonomy is discussed briefly.
    Notes: Die oberirdischen Teile von Villanova titicaensis ergeben zusätzlich zu bekannten Verbindungen das Heliangolid 5 und mehrere Diterpene (11-16) mit einem bisher nicht beobachteten Kohlenstoffgerüst, das mit dem von Helifulvan verwandt ist. Die Strukturen werden durch spektroskopische Methoden und chemische Umwandlungen der Diterpene geklärt. Die Chemotaxonomie wird kurz diskutiert.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
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