THC and CBD are the most commonly occurring cannabinoids in cannabis. What distinguishes them structurally?
THC and CBD are structural isomers. They are both 21 carbon- containing phytocannabinoids and share an identical chemical formula, C21H30O2. However, the way that the atoms are arranged in the two molecules is different. There is an oxygen-containing closed ring in THC that is open in CBD. Dissolved in a solution, through a process known as isomerization involving heat and acid, the two compounds can be interconverted chemically.