Cannabinoids such as cannabidiol (CBD) are isomers of tetrahydrocannabinol (THC) from the cannabis plant. Isomerization is the process of creating a new compound from the same starting components by rearranging the molecules in a first compound. Isomers of THC are referred to by the position of the carbon with a double bond in the nomenclature used to characterize them, such as the most popular Delta-9 THC, which has the double bond on the 9th carbon, and Delta-8, which has the double bond on the 8th carbon.