Researchers determined the crystal structures of norpsilocin, a naturally occurring compound found in magic mushrooms that is chemically similar to psilocin. This work is important because norpsilocin appears to be as potent as psilocin at serotonin receptors and may contribute to the therapeutic effects of magic mushroom extracts. By obtaining pure crystalline forms and understanding the compound’s structure, scientists can better study its properties and potential medical applications for treating conditions like depression and anxiety.