A psychoactive cannabinoid with similar effects to delta-9-THC. It’s an isomer of delta-9-THC, and the two are found together in hemp, though in low quantities. 

The main psychoactive component of cannabis, and one of over 113 cannabinoids found in the plant. The chemical formula for THC is C21H30O2, and the term THC usually refers to the delta-9-THC isomer. 

A positional isomer of tetrahydrocannabinol that was discovered in the 1980s. It’s also known as Δ2-THC