Journal
HETEROCYCLES
Volume 91, Issue 7, Pages 1417-1422Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.3987/COM-15-13216
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- CONACyT (Mexico)
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The natural product chapingolide {systematic name: (4aS, 7R, 7aR)-7-hydroxy-7-(hydroxyrnethyl)-4,4a,7,7a-tetrahydrocyclopenta[c]pyran-3(1H)-one}, C9H12O4, (1), is a new 11-nor-iridoid isolated from Calatola mollis Standl. The colourless compound has a bicyclic structure with an endo double bond in the five-membered ring. The absolute configuration was established by mean of the anomalous dispersion of the oxygen scatters present in the structure.
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