(3R,5R,6S,7S,9R,11E,13R,14R)-3,5,7,9,13-Pentamethyl-6-hydroxy-14-ethyl-1-oxa-11-cyclotetradecene-2,4,10-trione;(3R,5R,6S,7S,9R,11E,13R,14R)-3,5,7,9,13-Pentamethyl-6-hydroxy-14-ethyloxacyclotetradeca-11-ene-2,4,10-trione;Narbonolide
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