ウェブ4 日前 · Tetrahydrocannabinol (THC) is a cannabinoid found in cannabis. [9] It is the principal psychoactive constituent of cannabis and one of at least 113 total cannabinoids identified on the plant. Its chemical formula C 21 H 30 O 2 includes compounds, [10] the term THC usually refers to the delta-9-THC isomer with chemical name (−)-trans-Δ 9 …