Seco-LSD is an analogue of LSD with one or more bonds removed and may refer to:
3,5-Seco-LSD (UCD0120 or dides-B,C-LSD) 8,10-Seco-LSD (NDTDI) 10,11-Seco-LSD (UCD0121)
Additional seco-LSD compounds with more bonds (and atoms) removed include UCD0120 (dides-B,C-LSD), N-DEAOP-NMT, and N-DEAOP-NMPEA.
See also Secoergoline Nor-LSD (disambiguation) Des-LSD Partial ergoline Secosteroid