Return Of The Lysergamides Part I: Analytical And Behavioral Characterization Of 1-propionyl-d-lysergic Acid Diethylamide 1p-lsd Pmc Return Of The Lysergamides Part I: Analytical And Behavioral Characterization Of 1-propionyl-d-lysergic Acid Diethylamide 1p-lsd Pmc acadiacs.org Description also N-Ethyl- nor -lysergic acid N, N-diethylamide is a lesser-known novel psychedelic of the lysergamide class. ETH-LAD is chemically similar to LSD and has a similar mechanism of action,