Ψ-2C-T-4

Ψ-2C-T-4, or psi-2C-T-4, also known as 4-isopropylthio-2,6-dimethoxyphenethylamine, is a psychedelic drug of the phenethylamine and Ψ-PEA families. It is a positional isomer of 2C-T-4.
According to Alexander Shulgin in his book PiHKAL, Ψ-2C-T-4 produced short-lasting threshold psychoactive effects at doses of 8 to 12mg. Higher doses were not assessed and its effective dose range has not been determined. In a subsequent review, Shulgin stated that it was active at doses in the "10 to 20mg range" but that more study was required to establish its dose range and effects.
The drug was first described in the scientific literature by Shulgin by 1991 and was further briefly described by him in 2003. It is a controlled substance in Canada under phenethylamine blanket-ban language.