LSD was purchased from Cerilliant Cor- poration (Round Rock, TX, USA). (2'S,4'S)-Lysergic acid 2,4-dimethylazetidide (LSZ) was purchased from Chiron (Trondheim, Norway). Bond Elut C18, 500 mg, 3 mL (Agilent, Santa Clara, CA, USA) was used for purification. Sample ...