Journal ArticleDOI
Amoenumin, A 9,10-dihydro-5H-phenanthro-(4,5-b,c,d)-pyran from Dendrobium amoenum
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TLDR
The structure of a 9,10,dihydro-5H-phenanthro-(4,5-b, c, d )-pyran, amoenumin, from the orchid Dendrobium amoenum has been established on the basis of spectral data.About:
This article is published in Phytochemistry.The article was published on 1989-01-01. It has received 21 citations till now. The article focuses on the topics: Pyran.read more
Citations
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Journal ArticleDOI
Chemistry, bioactivity and quality control of Dendrobium, a commonly used tonic herb in traditional Chinese medicine
TL;DR: The main chemical components of Dendrobium are alkaloids, aromatic compounds, sesquiterpenoids and polysaccharides, with multiple biological activities, including immunomodulatory, neuroprotective and anti-tumor effects.
Book ChapterDOI
Biaryls in nature: a multi-facetted class of stereochemically, biosynthetically, and pharmacologically intriguing secondary metabolites.
Journal ArticleDOI
Bibenzyl derivatives from the orchid Dendrobium amoenum
P.L Majumder,S Guha,Souvik Sen +2 more
TL;DR: In this paper, the structures of amoenylin and isoamenylin were established as 4-hydroxy-3,4′-dihydroxy-5-methoxybibenzyl and 3, 4′-hydroxyl 3,4,5-trimethoxy bibenenzyl, respectively, mainly from spectral evidence.
Journal ArticleDOI
Vascular Epiphytic Medicinal Plants as Sources of Therapeutic Agents: Their Ethnopharmacological Uses, Chemical Composition, and Biological Activities.
TL;DR: This is an extensive review on epiphytic plants that have been used traditionally as medicines and their traditional medicinal uses, and their reported phytochemical properties and pharmacological properties aligned with their traditional uses.
Journal ArticleDOI
Aryllead triacetates in the synthesis of oxaphenanthrene derivatives
TL;DR: In the presence of triethylamine and a pyridine derivative, dibenzo[ b, d ]-6 H -pyrans can be obtained.
References
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Journal ArticleDOI
13C NMR spectroscopy of neolignans
Ernest Wenkert,Hugo E. Gottlieb,Otto R. Gottlieb,Marilia O. da S. Pereira,Mariza Drumond Formiga +4 more
TL;DR: In this article, the 13 C NMR spectra of 15 neolignans of several structural types and two lignans were analyzed and their carbon shifts assigned, and the shifts of pyrogallol ether and ethyl phenyl carbinyl ether models were used in this connection.
Journal ArticleDOI
Coelonin, A 9,10-dihydrophenanthrene from the orchids Coelogyne ochracea and Coelogyne elata
TL;DR: 2,7-Dihydroxy-4-methoxy-9,10-dihydrophenanthrene was isolated and identified from the whole plant of Coelogyne ochracea and C. elata.
Journal ArticleDOI
Nuclear magnetic resonance spectra and structures of some C-glycosyl flavonoids
WE Hillis,D. H. S. Horn +1 more
TL;DR: From an examination of the nuclear magnetic resonance spectra, optical rotations, and other properties of a number of flavonoid C-glycosides, their acetates, and related model compounds, it was concluded that vitexin, bayin, puerarin, and isohemiphloin are C-β-D-glucosides with the sugar substituent in the 8 position of the flavonoids nucleus as mentioned in this paper.
Journal ArticleDOI
Structure of dendrobine
Yasuo Inubushi,Y. Sasaki,Y. Tsuda,B. Yasui,Takeshi Konita,J. Matsumoto,Emiko Katarao,J. Nakano +7 more
TL;DR: From degradative and spectroscopic evidence, formula XXXI is proposed as the presumable structure of dendrobine and its stereochemical structure is shown in formula XXXIV or its mirror image.