DOB-2-DRAGONFLY-5-BUTTERFLY is a drug of the phenethylamine, DOx, and FLY families with an unusual furo[2,3-g]chromene core structure which acts as a 5-HT<sub>2A</sub> receptor agonist. It was first synthesised by David E. Nichols and colleagues in 2008, and while it is weaker than similar compounds such as Bromo-DragonFLY it is still the most potent among a number of related derivatives. It is a controlled substance in Canada under phenethylamine blanket-ban language.