AL-LAD, or 6-allyl-6-nor-lysergic acid diethylamide, is a semisynthetic alkaloid of the lysergamide family. AL-LAD is a structural analog of lysergic acid, with an N,N-diethylamide functional group bound to RN of the chemical structure. AL-LAD's chemical structure contains a bicyclic hexahydroindole fused to a bicyclic quinoline group (nor-lysergic acid). Unlike LSD, AL-LAD does not contain a methyl group substituted at R6 of its nor-lysergic acid skeleton, this is represented by the nor- prefix. Instead, AL-LAD is substituted at R6 with an allyl group comprised of a methylene bridge bound to a vinyl substituent. At carbon 8 of the quinoline a N,N-diethyl carboxamide is bound.
AL-LAD is a chiral compound with two stereocenters at R5 and R8. AL-LAD, also called (+)-D-AL-LAD, has an absolute configuration of (5R, 8R). The three other stereoisomers of AL-LAD do not have psychoactive properties.[5]