(-)- trans-Δ 9-Tetrahydrocannabiphorol Content of Cannabis sativa Inflorescence from Various Chemotypes

The (-)-trans-Δ⁹-tetrahydrocannabiphorol (Δ⁹-THCP, 1) content of the inflorescence from six Cannabis sativa chemotypes, including 14 plants of distinct genotypes, and two extracts was determined quantitatively via high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). This represents the first comprehensive quantitative screening for 1 from various C. sativa chemotypes. Compound 1 was detected in all 13 inflorescence samples originating from “(-)-trans-Δ⁹-tetrahydrocannabinol (Δ⁹-THC, 2) dominant” C. sativa chemotypes, but was not detected in a “cannabidiol (CBD, 3) dominant” chemotype. The inflorescence content of 1 ranged approximately from 0.0023% to 0.0136% (w/w). Comprehensive inflorescence sampling was performed for each specimen investigated. A trend between inflorescence cannabinoid potency and the location of which the inflorescence was sampled on the C. sativa plant was observed for the three cannabinoids tested (1–3). The preliminary results obtained indicate Δ⁹-THCP (1) may have a higher degree of prevalence in C. sativa inflorescence than previously estimated.