Enantiomeric cannabinoids: stereospecificity of psychotropic activity

Abstract
The 1,1-dimethylheptyl homolog of (−)-(3R,4R)-7-hydroxy-delta-6-tetrahydrocannabinol (compoundII) is highly psychotropic in mice, rats and pigeons. The (+)-(3S,4S) enantiomer (III) was found to be psychotropically inactive at doses up to several thousand times those of the ED50 of (II).