Tetramethoxyphenethylamines (TeMPEA) are a group of positional isomers of the psychedelic cactus alkaloid mescaline. Some of them are described in the book PiHKAL by Alexander Shulgin and Ann Shulgin.
2,3,4,5-Tetramethoxyphenethylamine (TeMPEA-1) TeMPEA-2 (2,3,4,6-tetramethoxyphenethylamine) TeMPEA-3 (2,3,5,6-tetramethoxyphenethylamine) BOM (drug) (3,4,5,β-tetramethoxyphenethylamine)
See also Substituted methoxyphenethylamine Methoxyphenethylamine Dimethoxyphenethylamine Trimethoxyphenethylamine Pentamethoxyphenethylamine Methoxyamphetamine Dimethoxyamphetamine Trimethoxyamphetamine Tetramethoxyamphetamine Pentamethoxyamphetamine