2C-B-PYR
2C-B-PYR, also known as 3-pyrrolidine, is a serotonin receptor modulator of the phenethylamine family. It is a cyclized phenethylamine, more specifically a cyclized pyrrolidine derivative of the psychedelic drug 2C-B, and is closely related to ZC-B and 2C-B-3PIP. The drug acts as a potent and efficacious agonist of the serotonin 5-HT2A and 5-HT2C receptors. It was patented by Lophora in 2021 and was first described in the scientific literature in 2024.