Colletoketol

(3E,6R,9E,12R,14R)-12-Hydroxy-6,14-dimethyl-1,7-dioxacyclotetradeca-3,9-diene-2,8,11-trione

(3E,6R,12R,14R,9E)-6,14-Dimethyl-12-hydroxy-1,7-dioxa-3,9-cyclotetradecadiene-2,8,11-trione