2C-O-4, also known as 4-isopropoxy-2,5-dimethoxyphenethylamine, is a phenethylamine of the 2C family. It is also a positional isomer of isoproscaline and was probably first synthesized by Alexander Shulgin. It produces hallucinogenic or psychedelic effects. Because of the low potency of 2C-O-4, and the inactivity of 2C-O, Shulgin felt that the 2C-O series would not be an exciting area for research, and did not pursue any further analogues.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).