Ergoline ring system numbered and labeled.
Seco-LSD is an analogue of LSD with one or more bonds removed and may refer to:
- 3,5-Seco-LSD (also known as DEIMDHPCA)
- 8,10-Seco-LSD (also known as NDTDI)
- 10,11-Seco-LSD
Additional seco-LSD compounds with more bonds (and atoms) removed include DEMPDHPCA, N-DEAOP-NMT, and N-DEAOP-NMPEA.