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Cacalolides from Senecio barba‐johannis
Author(s) -
BurgueñoTapia Eleuterio,
JosephNathan Pedro
Publication year - 2003
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.1179
Subject(s) - chemistry , senecio , chemical shift , stereochemistry , botany , biology
From the roots of Senecio barba‐johannis DC, the two new cacalolides 13‐acetoxycacalohastin (2) and 13‐hydroxy‐14‐oxocacalohastin (3), together with the known cacalolide 13‐acetoxy‐14‐oxocacalohastin (4) were isolated. Their structures were determined on the basis of chemical and spectroscopic evidence. Complete 1 H and 13 C NMR chemical shift assignments of these compounds were achieved using one‐ and two‐dimensional NMR methods, including gHMQC and gHMBC experiments. Copyright © 2003 John Wiley & Sons, Ltd.