“The 11-hydroxylation of three cannabinoids by the microsomes was markedly inhibited by sulfaphenazole, a selective inhibitor of CYP2C enzymes, … the hydroxylations at the 7alpha-(Delta(8)-THC), 8beta-(Delta(9)-THC) and 8-positions (CBN) of the corresponding cannabinoids were highly … by ketoconazole , a selective inhibitor … CYP3A enzymes.”