8-Oxogeranial is a chemical substance (also incorrectly called 10-oxogeranial), that is a monoterpene. The terpenoid is produced by 8-hydroxygeraniol dehydrogenase which uses 8-hydroxygeraniol as its substrate. 8-Oxogeranial is itself a substrate for iridoid synthase which synthesizes cis-trans-iridodial and cis-trans-nepetalactol.