the urinary excretion of delta 1-tetrahydrocannabinol-7-oic acid ( delta 1-thc-7-oic acid ) , the major urinary metabolite of delta 1-thc , and the total amount of thc metabolites was studied in heavy marijuana users after smoking using high-performance liquid chromatography and the emt-d.a.u . cannabinoid assay .
C0039663
thc
C0006864
cannabinoid