Lysergic acid butylamide
Lysergic acid butylamide, also known as N-butyllysergamide (NB-LA), is a serotonin receptor modulator of the lysergamide family related to the psychedelic drug lysergic acid diethylamide (LSD). It is the analogue of LSD in which the N,N-diethyl groups have been replaced with an N-butyl group and is also the N-butyl derivative of ergine (lysergic acid amide; LSA).