Wikipedia
TASB (psychedelics)
TASB, or thio asymbescaline, is a series of lesser-known psychedelic drugs similar in structure to asymbescaline and to mescaline. They were first synthesized by Alexander Shulgin and written up in his book PiHKAL (Phenethylamines i Have Known And Loved). Very little is known about their dangers or toxicity.