Norbaeocystin is a naturally occurring psychedelic substance found in some species of magic mushrooms. It is structurally related to baeocystin and psilocybin, the active ingredient in magic mushrooms, and is believed to have similar effects on the brain.

Norbaeocystin is a relatively uncommon component of magic mushrooms, and it is not found in all species. It is thought to be present in very small amounts in mushrooms that contain baeocystin and psilocybin, but it is not clear how much norbaeocystin is typically found in these mushrooms.

The effects of norbaeocystin are not well understood, as there has been very little research on this substance. It is believed to have psychedelic effects, similar to those of baeocystin and psilocybin, but the exact nature of these effects is not known.