Des-LSD, or LSD with a part removed, may refer to:
Des-A-LSD Des-B-LSD (UCD0068) Des-C-LSD 4-Desmethylene-LSD (UCD0179) 10,11-Seco-LSD (UCD0121) Des-D-LSD NDTDI (9-desmethine-LSD; 8,10-seco-LSD)
It may also refer to LSD with multiple parts removed:
Dides-B,C-LSD (UCD0120) Dides-C,D-LSD N-DEAOP-NMT (desvinyl-LSD; 9,10-dinor-LSD) Trides-B,C,D-LSD N-DEAOP-NMPEA (PEA-NM-NDEPA) Trides-A,B,C-LSD THPC (UCD0162)
See also Partial lysergamide Nor-LSD Seco-LSD