Trichocereus pachanoi

The literature I’ve read indicates that many members of the trichocereus family are psychoactive. I’ve only tried three or four of these and found them to be basically equal in potency. Many references indicate that one variety, Trichocereus peruvianus, is several times as potent by weight as the other trichocereus species. Psychoactive species include: T. bridgesii, T. cuzcoensis, T. fulvinanus, T. macrogonus, T. pachanoi, T. peruvianus, T. taquimbalensis, T. tersheckii, T. validus, T. werdermannius – Peter Stafford – Psychedelics encylopedia

San Pedro cactus is prepared for ingestion by slicing and then boiling for six to eight hours. It is then evaporated into a powder or capsulable resin.

https://en.wikipedia.org/wiki/Echinopsis_pachanoi

Erowid.org – Acid-Base Extraction of Mescaline from San Pedro