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Structure determination of ramosine, a guaianolide, by NMR spectroscopy
Author(s) -
Khan Sher Bahadar,
Afza Nighat,
Malik Abdul,
ul Haq Azhar,
Ahmed Zaheer
Publication year - 2004
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1461
Subject(s) - chemistry , chloroform , sesquiterpene , sesquiterpene lactone , hydroxymethyl , nuclear magnetic resonance spectroscopy , lactone , stereochemistry , two dimensional nuclear magnetic resonance spectroscopy , organic chemistry
Ramosine, a new sesquiterpene lactone, was isolated from the chloroform fraction of Amberboa ramosa and the structure was assigned as 4β‐(hydroxymethyl)‐3β,4α‐dihydroxy‐8α‐[( S )‐3‐hydroxy‐2‐ethylenepropionyloxy]‐1αH, 5αH,6βH,7αH,11βH,11α‐methylguaia‐10(14)‐en‐6, 12‐olide by extensive NMR studies. Copyright © 2004 John Wiley & Sons, Ltd.