2C-I-FLY hydrochloride is a phenethylamine that induces the head-twitch response in mice[1].
References
[1] Halberstadt AL, et al. Comparison of the behavioral responses induced by phenylalkylamine hallucinogens and their tetrahydrobenzodifuran ("FLY") and benzodifuran ("DragonFLY") analogs. Neuropharmacology. 2019 Jan;144:368-376. DOI:10.1016/j.neuropharm.2018.10.037
