Journal ArticleDOI
Chromenes from Ageratina arsenii and revised structures of two epimeric chromene dimers
TLDR
Agrostophyllin, the first naturally occurring phenanthropyran derivative, was isolated from the orchid Agroophyllum khasiyanum as mentioned in this paper, and it was shown to be a phenotypic indicator of the presence of humans.About:
This article is published in Phytochemistry.The article was published on 1988-01-01. It has received 13 citations till now. The article focuses on the topics: Ageratina & Agrostophyllum.read more
Citations
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Benzopyran dimers from melicope ptelefolia
TL;DR: The leaves of Melicopte ptelefolia afforded two new 2,2-dimethyl-2H-1-benzopyran dimers named 5,5' -dimethoxy-alloagerasanin and melifolin this article.
Journal ArticleDOI
An investigation of bioactive phytochemicals in the leaves of Melicope vitiflora by electrospray ionisation ion trap mass spectrometry.
TL;DR: Some molecular masses and the corresponding fragmentations were found that did not correlate with any known compounds thus revealing potentially novel natural products that could be investigated on a larger scale and could ultimately find application as new drugs against MRSA and other multi drug resistant microorganisms.
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Six-Membered Ring Systems: With O and/or S Atoms
John D. Hepworth,B. Mark Heron +1 more
TL;DR: In this article, a review of reaction chemistry and new ring synthetic methods for pyranones is presented, which covers work published in the calendar year 2010 and includes new ring synthesis methods for trioxanes, tetraoxane, dioxanes, trithianes and oxathianes.
Journal ArticleDOI
α-Glucosidase Inhibitors from Ageratina grandifolia.
José A. Gutiérrez-González,Araceli Pérez-Vásquez,Rafael Torres-Colín,Manuel Rangel-Grimaldo,Daniela Rebollar-Ramos,Rachel Mata +5 more
TL;DR: In this paper, a fractionation of an aqueous extract from the aerial parts of Ageratina grandifolia yielded a new natural product, namely, 4-hydroxy-3-((S)-1'-angeloyloxy-(R)-2',3'-epoxy-3'-methyl)butylacetophenone (1), along with eight known compounds, including three flavonoids (2-4) and five chromenes (5-9).
Journal ArticleDOI
Chemistry of the Oxylobinae
TL;DR: The known chemistry of subtribe Oxylobinae, tribe Eupatorieae, Asteraceae, is reviewed and compared with the chemistry of other subtribes of this largely neotropical assembly of Composites.
References
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Journal ArticleDOI
Neue Isopentenyl‐acetophenon‐Derivate aus Helianthella uniflora
TL;DR: In this paper, the authors discuss the biogenetical relationships between the tetrahedron of Helianthella uniflora and the acetophenone derivatives of the genus.
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Über Inhaltsstoffe der Gattung Flourensia
Ferdinand Bohlmann,Michael Grenz +1 more
TL;DR: In this paper, two species of the genus Flourensia have been investigated and their structures have been elucidated by spectroscopic methods, besides the already known characteristic 4-hydroxyacetophenone derivatives.
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Natürlich vorkommende Cumarin‐Derivate, IX1) Über die Inhaltsstoffe der Gattung Gerbera
TL;DR: The roots of Gerbera species contain known polyynes 1 and 2 as discussed by the authors, and two new coumarins (4 and 7) were isolated, the structures being elucidated by spectroscopic data as well as by synthesis.
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Dimeric chromenes and mixed dimers of a chromene with euparin from Encelia canescens
TL;DR: In this paper, the structure of Encelia canescens was elucidated hy high field 1 H NMR spectroscopy, revealing four new dimeric p-hydroxyacetophenone derivatives, two epimeric chromene dimers and two Epimeric mixed dimers of euparin and encecalin.
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Sequiterpenes from Ageratina tomentella
Nianbai Fang,Tom J. Mabry +1 more
TL;DR: Ageratina tomentella has been investigated for sesquiterpene lactones, including 11,13-dehydro-8β-tigloyloxy-eleman-12-oic acid as discussed by the authors.