Robuta

https://pubmed.ncbi.nlm.nih.gov/11950794/ Metabolism of (+)- and (-)-limonenes to respective carveols and perillyl alcohols by CYP2C9 and... Limonene, a monocyclic monoterpene, is present in orange peel and other plants and has been shown to have chemopreventive activities. (+)- and (-)-Limonene... metabolism