Journal ArticleDOI
Chromenes from Ageratina arsenii and revised structures of two epimeric chromene dimers
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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
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Molecular disorder in (‒)-encecanescin.
Benito Reyes-Trejo,Diana Guerra-Ramírez,Holber Zuleta-Prada,Rosa Santillan,María Elena Sánchez-Mendoza,Jesús Arrieta,Lino Reyes +6 more
TL;DR: A good linear relationship between the experimental and calculated NMR data has been obtained for protons and carbon atoms and the GIAO/B3LYP/6-311++G(d,p) calculated magnetic isotropic shielding tensors for conformers 2 and 3 are reported.
Journal Article
X-Ray diffraction and NMR studies of two chromenes from the reoots of Ageratina arsenei
Mario A. Gómez-Hurtado,Judit A. Aviña-Verduzco,J. Betzabe González-Campos,Yliana López-Castro,Gabriela Rodríguez-García,Carlos M. Cerda-García-Rojas,Rosa E. del Río +6 more
TL;DR: In this article, el eupatoriocromeno (1) and the ripariocromeneno B (2) were used to compare distancias de enlace teoricas con las obtenidas del analisis of rayos X, mientras que RMN de los tensores de proteccion anisotropica obtenidos con el metodo GIAO se utilizaron for evaluar las diferencias in los desplazamientos quimicos teoricos con respect
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The genus Ageratina (Asteraceae) in America: An insight into its chemistry, and pharmacological potential.
Rachel Mata,Isabel Rivero-Cruz,José A. Gutiérrez-González,Araceli Pérez-Vásquez,José Luis Villaseñor +4 more
TL;DR: Ageratina is an American genus of the tribe Eupatorieae (Asteraceae) comprising about 320 species as mentioned in this paper , and it is used for medicinal purposes such as antinociceptive, antifeedant, larvicidal, acaricidal, antidiabetic, antiprotozoal, and wound-healing.
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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.