Natural compounds unique to the Cannabis sativa plant. The definitive number of cannabinoids has yet to be obtained as extensive research is still required, but current estimates relate over 60 cannabinoids. The most well known and studied of these compounds are delta-9-tetrahydrocannabinol (Δ9-THC – the substance primarily responsible for the psychoactive effects of cannabis) and cannabidiol (CBD – a non-psychoactive cannabinoid popular for its anticonvulsant, anti-inflammatory, and immune-modulating properties).