6-APB

6-APB, also known as 6-(2-aminopropyl)benzofuran, is an entactogen of the phenethylamine, amphetamine, and benzofuran families. 6-APB and related drugs are sometimes informally called "Benzofury" in media reports. It is similar in structure to MDA, but differs in that the 3,4-methylenedioxyphenylring system has been replaced with a benzofuran ring. 6-APB is also the unsaturated benzofuran derivative of 6-APDB. It may appear as a tan or brown grainy powder.

While the drug never became particularly popular, it briefly entered the rave and underground clubbing scene in the UK before its sale and import were banned. It falls under the category of research chemicals, sometimes called "legal highs" if uncontrolled. Because 6-APB and other substituted benzofurans have not been explicitly outlawed in some countries, they are often technically legal, contributing to its popularity.

6-APB was first described in the scientific literature in 2000 and emerged as a novel designer drug in 2010.