A new diosgenin derivative designated denfigenin has been isolated from the petrol extract of the whole plant Dendrobium fimbriatum, along with diosgenin and defuscin (n-triacontyl p-coumarate). Denfigenin was shown to be (25R)-22α-O-spirost-5-ene-3β,16α,17α-triol mainly based on 1H and 13C NMR spectral studies. Its molecular conformation has also been discussed. © 1992.

S K TALAPATRA

A BHAUMIK

B TALAPATRA

University of Calcutta (informally known as Calcutta University or CU) is a collegiate public state university located in Kolkata, West Bengal, India.&nbsp;Within India it is recognized as a &quot;Five-Star University&quot; and accredited &quot;A&quot; Grade by National Assessment and Accreditation Council.

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The University of Calcutta has secured the Fifth position among the Universities of India in the prestigious &quot;Indian University Ranking 2019&quot; list, released by the NIRF of the Ministry of Human Resource Development, Government of India.

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It was established on 24 January 1857, and was one of the first institutions in Asia to be established as a multidisciplinary and Western-style university. Its alumni and faculty include several heads of state, heads of government, social reformers, prominent artists, only academy award winner and Dirac medal winner in India, many Fellows of the Royal Society and five Nobel laureates as of 2019 which is highest in South Asia.

University Of Calcutta

Denfigenin, a diosgenin derivative from Dendrobium fimbriatum

Phytochemistry

The stereostructures and molecular conformations of six novel diterpene lactones, gelomulides A-F, isolated from the leaves of Gelonium multiflorum were established on the basis of NMR, mass spectral and chemical evidence. © 1989.

Stereostructures and molecular conformations of six diterpene lactones from Gelonium multiflorum

Dendrobium gibsonii, an Orchidaceae plant yielded the first natural fluorenone derivatives designated dengibsin and dengibsinin to which 1,5-dihydroxy-7-methoxy-9-fluorenone (1) and 1,6-dihydroxy-5, 7-dimethoxy-9-fluorenonc (2) structures have been assigned respectively. The structures are fully supported by the 1 H-NMR, IR, UV and MS spectral data of dengibsin and dengibsnin and a number of their pertinent derivatives. Aurantiamide acetate, dimethyl terephthalate and β-sitosterol have been isolated as the other constituents. © 1985.

Tetrahedron

On the chemistry of indian orchidaceae plants-II 1 1 For Part I see Ref. 1. Dengibsin and dengibsinin, the first natural fluorenone derivatives from dendrobium gibsonii lindl

Methoxylated flavones of Fortunella japonica

The American Historical Review

R. P. Singh. <italic>The Central Legislature in India, 1909–1935</italic>. Calcutta: Naya Prokash. 1984. Pp. xv, 268. Rs. 90.00

ChemInform

ChemInform Abstract: Chemistry of the Indian Orchidaceae Plants. Part 4. Revised Structures of Dengibsin and Dengibsinin: Chemical Shifts of Chelated Methoxyls.

Journal	Phytochemistry
Publisher	-
ISSN	0031-9422