THC-B is a phytocannabinoid and psychoactive. While not as strong as D9, this cannabinoid has been described as similar in how it interacts with our system. Specifically, it acts on the CB1 and CB2 receptors in the brain. This compound binds to them and has a stronger binding affinity than other homologs and isomers of THC, like delta-8 THC or HHC.