Various nitrogen analogs of A6aJOatetrahydrocannabinol were synthesized by a general procedure described in an earlier communication. Minimum effective doses (MEDds) and lethal doses (LDm's) were determined by a modified Irwin mouse screen after iv administration of compounds in PEG 200. The most potent compounds were the propargyl (5t), allyl (5m), and chloroallyl (50-q) derivatives. Overt behavioral effects (CNS ...