Substituted isotryptamine

Substituted isotryptamines, or simply isotryptamines, also known as 2-(1-indolyl)ethylamines, are a group of indoles closely related to the tryptamines but with the ethylamine side chain located at the 1 position of the indole ring system rather than at the 3 position as in tryptamines. Hence, they are positional isomers of tryptamines.