Clinical data
Routes of
By mouth, under the tongue
Legal status
Legal status
  • (6aR,9R)-N,N-diethyl-7-methyl-4-cyclopropylmethanoyl-4,6,6a,7,8,9-hexahydroindolo[4,3-fg]quinoline-9-carboxamide
PubChem CID
Chemical and physical data
Molar mass391.515 g·mol−1
3D model (JSmol)
  • CCN(CC)C(=O)[C@@H]5C=C2[C@@H](Cc3cn(C(=O)C1CC1)c4cccc2c34)N(C)C5
  • InChI=1S/C24H29N3O2/c1-4-26(5-2)23(28)17-11-19-18-7-6-8-20-22(18)16(12-21(19)25(3)13-17)14-27(20)24(29)15-9-10-15/h6-8,11,14-15,17,21H,4-5,9-10,12-13H2,1-3H3/t17-,21-/m1/s1

1cP-LSD (N1-(cyclopropylmethanoyl)-lysergic acid diethylamide) is an acylated derivative of lysergic acid diethylamide (LSD), which has been sold as a designer drug. [1][2] In tests on mice it was found to be an active psychedelic with similar potency to 1P-LSD.[3]

Legal status

1cP-LSD on blotter paper

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.[4][5]

See also


  1. ^ Tanaka R, Kawamura M, Hakamatsuka T, Kikura-Hanajiri R (2020). "[Identification of LSD Derivatives, 1cP-LSD, MIPLA and 1B-LSD in Illegal Products as Paper Sheet]". Yakugaku Zasshi. 140 (11): 1405–1413. doi:10.1248/yakushi.20-00124. PMID 33132277.
  2. ^ Vincenti F, Gregori A, Flammini M, Di Rosa F, Salomone A (July 2021). "Seizures of New Psychoactive Substances on the Italian territory during the COVID-19 pandemic". Forensic Science International. 326: 110904. doi:10.1016/j.forsciint.2021.110904. PMC 8411784. PMID 34371393.
  3. ^ Brandt SD, Kavanagh PV, Westphal F, Stratford A, Odland AU, Klein AK, et al. (June 2020). "Return of the lysergamides. Part VI: Analytical and behavioural characterization of 1-cyclopropanoyl-d-lysergic acid diethylamide (1CP-LSD)". Drug Testing and Analysis. 12 (6): 812–826. doi:10.1002/dta.2789. PMC 9191646. PMID 32180350.
  4. ^ "Förordning (1999:58) om förbud mot vissa hälsofarliga varor".
  5. ^ "LSD". Hallucinogenics. December 18, 2019. Archived from the original on November 24, 2022. Retrieved May 28, 2020.