Five indole alkaloids have been isolated from the aerial parts of Vinca major. Four of these have been identified as reserpinine (pubescine), vincamajoreine, majoridine and 10-methoxyvellosimine. The fifth base, a new indole alkaloid lochvinerine, has been assigned the depicted structure. © 1974.

A BANERJI

M CHAKRABARTY

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

Lochvinerine: A new indole alkaloid of Vinca major

Phytochemistry

Two new unsaturated amides, retrofractamides A and C, were isolated from the total above-ground parts of Piper retrofractum. Retrofractamide A was shown to be N-isobutyl-9(3′,4′-methylenedioxyphenyl)2E,4E,8E-nonatrienamide from spectroscopic and chemical investigations. The structure 6 for retrofractamide C was suggested from spectroscopic and chemical studies and was confirmed by a total stereoselective synthesis. The presence of sesamin and 3,4,5-trimethoxydihydrocinnamic acid as well as two higher homologues of retrofractamide A, viz. pipericide (retrofractamide B) and retrofractamide D was demonstrated. The synthesis of pipericide was also achieved. © 1985.

Structural and synthetic studies on the retrofractamides-amide constituents of Piper retrofractum

A new ester amide designated (-)-anabellamide was isolated along with 4′-hydroxydehydrokawain (2) and /3-sitosterol-/S-D-glucoside from the whole plant of Anaphalis subumbellata. (-)-AnabelIamide has been shown to be 1, the (5)-N-benzoylphenylalaninyl ester of (5)-N-benzoylphenylalanine on the basis of its spectrometric studies and its synthesis from (5)-(-)-phenylalanine. © 1983, American Chemical Society. All rights reserved.

Journal of Natural Products

Structure and synthesis of (-)-anabellamide. A new phenylalanine derived ester amide from anaphalis subumbellata: Occurrence of 4â€²-hydroxydehydrokawain

Two constituents of the seeds of Piper sylvaticum Roxb. have been fully characterized by chemical and spectroscopical investigation. These are the new epieudesmin-type lignan sylvatesmin (1), and 3′,5-dihydroxy-4′,7-dimethoxy flavone (2). © 1982, American Chemical Society. All rights reserved.

Journal	Phytochemistry
Publisher	-
ISSN	0031-9422