Identification of 15-nor-cleroda-3,12-diene in a Dominican amber

•15-nor-cleroda-3,12-diene in Dominican amber was identified by NMR.•A 5R,8R,9S,10R-configuration was established based on ROESY and confirmed by ECD.•The identified diene appears to originate from a Hymenaea species (Fabaceae).•It could be derived from decarboxylation of kovalenic acid or 3-cleroden-15-oic acid.