|Chemical and physical data|
|Molar mass||391.515 g·mol−1|
|3D model (JSmol)|
1cP-LSD (N1-(cyclopropylmethanoyl)-lysergic acid diethylamide) is an acylated derivative of lysergic acid diethylamide (LSD), which has been sold as a designer drug.  In tests on mice it was found to be an active psychedelic with similar potency to 1P-LSD.
Sweden's public health agency suggested classifying 1cP-LSD as a dangerous substance on 18 December 2019 and later classified it as such on 22 April 2021.