2C is a family of psychedelic compounds. 2CB is the most common, but there are many variants, such as 2c2i, which were readily available as research chemicals until roughly 15 years ago when tracking tightened up. 2c2i was/is popular among those in the know because you appear outwardly more normal than you do if on many other psychedelic chemicals. Visuals are fractal, as opposed to LSD, which is more melty. The 2C family was first synthesized/brought to light by Alexander Shulgin, who is also the father of MDMA (Ecstasy).
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