3-APB
3-APB, also known as 3-(2-aminopropyl)benzofuran or as 1-oxa-α-methyltryptamine (1-oxa-AMT), is a drug of the benzofuran family related to the psychedelic tryptamine α-methyltryptamine (AMT). It is the analogue and bioisostere of AMT in which the nitrogen atom of the indole ring has been replaced with an oxygen atom, resulting in the drug being a benzofuran rather than tryptamine derivative.