UCD0179

UCD0179
Clinical data
Other names	4-Desmethylene-LSD; 4-Nor-LSD; 3,5-Seco-LSD; Des-C-LSD; UCD0179; UCD-0179; DEIMDHPCA; "Compound 11"
Drug class	Serotonin 5-HT2 receptor agonist; Psychoplastogen; Simplified/partial LSD analogue
ATC code	None;
Identifiers
	IUPAC name (3R)-N,N-diethyl-5-(1H-indol-4-yl)-1-methyl-3,6-dihydro-2H-pyridine-3-carboxamide;
CAS Number	2640392-28-3;
PubChem CID	156278040;
Chemical and physical data
Formula	C19H25N3O
Molar mass	311.429 g·mol−1
3D model (JSmol)	Interactive image;
	SMILES CCN(CC)C(=O)[C@H]1CN(CC(=C1)C2=C3C=CNC3=CC=C2)C;
	InChI InChI=1S/C19H25N3O/c1-4-22(5-2)19(23)15-11-14(12-21(3)13-15)16-7-6-8-18-17(16)9-10-20-18/h6-11,15,20H,4-5,12-13H2,1-3H3/t15-/m1/s1; Key:GDCMLRPQENDWLG-OAHLLOKOSA-N;

UCD0179, also known as 4-desmethylene-LSD or 3,5-seco-LSD, is an indole derivative and a "partial" or simplified lysergamide which is closely related to the highly potent serotonergic psychedelic lysergic acid diethylamide (LSD). It is specifically the analogue of LSD in which one of LSD's carbon atoms in the ergoline ring system, the carbon at position 4, has been removed. This in turn renders the molecule more flexible and makes it a partially conformationally constrained indolic phenethylamine-containing compound rather than an ergoline. UCD0179 is known to be a highly potent serotonin 5-HT₂ receptor agonist similarly to LSD and to produce psychoplastogenic effects.