Known chemically as 2-aminoindane, 2AI is a structural analogue of amphetamine, where the alpha section of the propane chain has been attatched to the benzene ring to form a cyclopentyl moiety. It has psychostimulant properties similar to amphetamine and has been marketed as an RC.
Known chemically as 5-iodoaminoindane, 5IAI is a halogenated analogue of 2-AI. It produces stimulant and enactogenic effects. Its mode of action involves potentiation of monoamine pathways, due to an increased synaptic release of serotonin, noradrenaline, and dopamine.