OML-632, also known as 1-hydroxymethyllysergic acid diethylamide (1-hydroxymethyl-LSD), is a psychedelic drug of the lysergamide family related to lysergic acid diethylamide (LSD).
OML-632 has about 66% of the hallucinogenic potency of LSD in humans (which is stated as active at 50âÂÂ100üg) and about 59% of the antiserotonergic activity of LSD in the isolated rat uterus in vitro. However, OML-632 may simply act as a prodrug of LSD. It has also been said to serve as a metabolic intermediate in the demethylation of 1-methyl-LSD (MLD-41) into LSD.
OML-632 was first described in the scientific literature by 1957. The compound has been mistakenly referred to as "1-methoxy-LSD" or "1-MeO-LSD" in some publications.