9-nor-9ß-Hydroxyhexahydrocannabinol (HHC), is a synthetic cannabinoid derivative which resulted from early modifications to the structure of THC, in a search for the simplest compound that could still fulfil the binding requirements to produce cannabis-like activity. HHC is active in its own right with similar potency to THC, but further simplification and variation of this parent structure lead to more potent, yet structurally simpler derivatives such as CP 47,497 and CP 55,940, which after several steps of modification have become quite structurally distinct from THC, while HHC on the other hand is still substantially similar in structure to THC.