13-Methoxy-LSD

13-Methoxy-LSD is a lysergamide related to lysergic acid diethylamide. It is the derivative of LSD with a methoxy group at the 13 position and is the O-methyl ether of 13-hydroxy-LSD. Similarly to 13-hydroxy-LSD and other related compounds like 12-hydroxy-LSD and 12-methoxy-LSD, 13-methoxy-LSD has been reported to produce LSD-like electroencephalogram changes in rabbits. Conversely, 14-methoxy-LSD was inactive. 13-Methoxy-LSD was first described in the scientific literature by 1979.