Most of the currently known 2C compounds were first synthesized by Alexander Shulgin in the 1970s and 1980s and published in his book PiHKAL (Phenethylamines i Have Known And Loved).
The majority of known 2C substances were first developed by Alexander Shulgin in the 1970s and 1980s, as described in his publication PiHKAL (Phenethylamines i Have Known And Loved).