Tetrahydrocannabivarin, also known as tetrahydrocannabivarol, THCV, or THV, is a psychoactive cannabinoid found in minor amounts in the hemp plant Cannabis sativa. It is an analog of tetrahydrocannabinol (THC) with the sidechain shortened by two CH2 groups. THCV can be used as a marker compound to differentiate between the consumption of hemp products and synthetic THC (Dronabinol, Marinol).