Journal ArticleDOI
A ring-B oxygenated phenanthrene derivative from the orchid Bulbophyllum gymnopus
L. Majumder,Subhra Banerjee +1 more
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TLDR
Gymnopusin, the first naturally occurring phenanthrene derivative having a hydroxyl group at C-9, was isolated from the orchid Bulbophyllum gymnopus.About:
This article is published in Phytochemistry.The article was published on 1988-01-01. It has received 32 citations till now. The article focuses on the topics: Gymnopusin & Gymnopus.read more
Citations
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Journal ArticleDOI
Natural phenanthrenes and their biological activity.
TL;DR: The present study furnishes an overview of the hydroxy or/and methoxy-substituted 9,10-dihydro/phenanthrene, methylated, prenylated and other monomeric derivatives, dimeric and trimeric phenanthrenes and their biological activities.
Journal ArticleDOI
Phenanthrenes, dihydrophenanthrenes and bibenzyls from the orchid bulbophyllum vaginatum
TL;DR: Two new phenanthrenes (4,9-dimethoxyphenanthrene-2,5-diol and 4,6-dimethyltoxymethylhexane-1,3,7-triol) and two new 9,10-dihydrophenanthreness (4methoxy-9, 10-dibenzyls and the triterpenoid friedelin were isolated and characterized from the hexane extract of the orchid Bulbophyllum vaginatum) were determined by spectroscopic analyses
Book ChapterDOI
Biaryls in nature: a multi-facetted class of stereochemically, biosynthetically, and pharmacologically intriguing secondary metabolites.
Journal ArticleDOI
Lusianthrin and lusianthridin, two stilbenoids from the orchid Lusia indivisa
P.L. Majumder,Saswati Lahiri +1 more
TL;DR: Lusianthrin and lusian-thridin, two new stilbenoids, were isolated from the orchid Lusia indivisa.
Journal ArticleDOI
Cytotoxic phenolics from Bulbophyllum odoratissimum
TL;DR: A phytochemical study of the whole plant of Bulbophyllum odoratissimum (J.E. Smith) Lindl (Orchidaceae) and cytotoxicity measurement of its isolated compounds have been carried out and all compounds, except for 9, have not been reported in this plant before.
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
Nudol, a phenanthrene of the orchids Eulophia nuda, Eria carinata and Eria stricta
TL;DR: An amorphous phenanthrene, named nudol has been isolated from Eulophia nuda, Eria carinata and E. stricta and was identified as 2,7-dihydroxy-3,4-dimethoxyphenanthrene.
Journal ArticleDOI
Confusarin and confusaridin two phenanthrene derivatives of the orchid Eria Confusa
P.L. Majumder,Amita Kar +1 more
TL;DR: Two new polyoxygenated phenanthrene derivatives, confusarin and confusaridin, are isolated from the orchid Eria confusa and are shown to be 2,7-dihydroxy-3,4,8-trimethoxyphenanthrene and 2,6- dihydrox-2,6,7, 8-tetramethoxyrene, respectively.
Journal ArticleDOI
Bulbophyllanthrin, a phenanthrene of the orchid Bulbophyllum leopardium
TL;DR: Bulbophyllanthrin, a novel phenanthrene derivative from the orchid B. leopardium, was shown to have the structure 1a mainly on the basis of spectral evidence including 13 C and 2D NMR spectra as discussed by the authors.
Related Papers (5)
Confusarin and confusaridin two phenanthrene derivatives of the orchid Eria Confusa
P.L. Majumder,Amita Kar +1 more