4-HO-NALT
4-HO-NALT, also known as 4-hydroxy-N-allyltryptamine, is a tryptamine derivative developed by modification of norpsilocin. It produces a head-twitch response in mice consistent with psychedelic-like activity, as do the corresponding ethyl, propyl, isopropyl, and benzyl derivatives, but the bulkier t-butyl and cyclohexyl derivatives are inactive.