The entactogenic compound in the phenethylamine and amphetamine groups is 6-APB Benzofury CAS # 286834-85-3 or 6-(2-aminopropyl)benzofuran or 1-benzofuran-6-ylpropan-2-amine (6-APB), also known as Benzofury. It is a recreational drug that is similar to MDA in structure, but varies in that a benzofuran ring has been substituted for the 3,4-methylenedioxyphenyl ring system. 6-APB is also 6-APDB’s unsaturated benzofuran derivative. Although the drug was never especially popular, until its selling and import was outlawed, it briefly entered the rave and underground clubbing scene in the United Kingdom.