5,6-Dihydro-4-methyl-6-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2H-pyran-2-one is an intermediate in synthesizing 9-cis,13-cis-Retinoic Acid (R245015), an endogenous retinoid that induces liver fibrosis via the activation of latent transforming growth factor-β. A major plasma metabolite of 9-cis Retinoic Acid (R245000).