Journal ArticleDOI
Flavonoid aglycones from Xanthocephalum gymnospermoides var. gymnospermoides
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TLDR
In this article, six known flavonoid aglycones and the newly described 5,7,4′-trihydroxy-3,3′,5′-trimethoxyflavone were isolated from Xanthocephalum gymnospermnoides var.About:
This article is published in Phytochemistry.The article was published on 1987-01-01. It has received 8 citations till now. The article focuses on the topics: Astereae.read more
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Flavonoids of the Sunflower Family (Asteraceae)
Bruce A. Bohm,Tod F. Stuessy +1 more
TL;DR: The Flavonoids as Indicators of the Evolutionary Process and Hybridization and Introgression and Flavonoid Relationships with other Families.
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Six new diterpenoids from Suregada multiflora.
Ismet Ara Jahan,Nilufar Nahar,M Mosihuzzaman,Farzana Shaheen,Atta-Ur-Rahman,M. Iqbal Choudhary +5 more
TL;DR: Six new diterpenoids were isolated from a CH(2)Cl(2)-MeOH extract of the bark of Suregada multiflora on the basis of one- and two-dimensional NMR and other spectroscopic studies and chemical derivatizations.
Journal ArticleDOI
Novel diterpene lactones from Suregada multiflora.
Ismet Ara Jahan,Nilufar Nahar,M. Mosihuzzaman,Farzana Shaheen,Zeba Parween,Atta-ur-Rahman,M. Iqbal Choudhary +6 more
TL;DR: Two new diterpene lactones, suregadolides A and B, were isolated from a dichloromethane extract of Suregada multiflora bark, which possess a novel skeleton, which contains a cyclopropane ring bridging C-3 and C-4 of the abietane skeleton.
Journal ArticleDOI
Flavonoids and a coumarin from Gutierrezia sphaerocephala
TL;DR: In this paper, the aerial parts of Gutierrezia sphaerocephala were extracted using spectroscopic methods and two new flavonoids, 5,3,4,5,5′-tetrahydroxy-6,7-dimethoxyflavone and 5,7,4′-trihydroxy -6,3′-dimethyl-flavanone, were elucidated.
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Occurrence and Distribution of the Flavone Tricetin and its Methyl Derivatives as Free Aglycones
Eckhard Wollenweber,Marion Dörr +1 more
TL;DR: A review of the occurrence of tricetin and its methyl ethers, with respect to their occurrence in the free state, is presented in this article, where a tabulated survey also includes a dozen unpublished results.
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Journal ArticleDOI
Fifty-one flavonoids from Gutierrezia microcephala
TL;DR: The isolation of forty-five of the fifty-one flavonoids from aerial parts of Gutierrezia microcephala are described and eight new compounds are identified.
Journal ArticleDOI
Highly oxygenated flavonoid aglycones from gutierrezia grandis
TL;DR: Twelve known and nine new highly oxygenated flavonoid aglycones, some of which exhibit 2′-oxygenation, were isolated from Gutierrezia grandis.
Journal ArticleDOI
Six 2′-hydroxyflavonols from Gutierrezia microcephala
TL;DR: In this paper, six 2′-hydroxyflavonols were isolated from Gutierrezia microcephala, including four new compounds, 5,7,2′-trihydroxy-3,6,4′,5′-tetramethoxyflavone, 5.7, 2.5
Journal ArticleDOI
Flavonoids from Gutierrezia grandis
TL;DR: The structures of the new compounds were 3,5,7,3,3′,4′-pentahydroxy-6,8-dimethoxyflavone, 5,7-3′-trihydroxy-3,6, 8, 4, 4, 5, 7, 3′, 4′, 5.5′ pentamethoxyFLavone 3′-Oglucoside as mentioned in this paper.