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Chemical structures of the main cannabinoids studied in this work including the applied numbering system. (a) R = H: cannabidiol (CBD), R = COOH: cannabidiolic acid (CBDA); (b) R = H: ∆9-tetrahydrocannabinol (∆9-THC), R = COOH: ∆9-tetrahydrocannabinolic acid A (THCA); (c) ∆8-tetrahydrocannabinol (∆8-THC); (d) cannabinol (CBN); (e) ∆9-tetrahydrocannabivarin (THCV); (f) cannabigerol (CBG).
