Bull. Soc. Chim. France 1190-91 (1961) (https://www.thevespiary.org/rhodium/Rhodium/pdf/indole.aziridine.tryptamine.pdf)
(https://www.thevespiary.org/rhodium/Rhodium/pdf/indole.aziridine.tryptamine.pdf)Post 387179 (https://www.thevespiary.org/talk/index.php?topic=13315.msg38717900#msg38717900)
(Chimimanie: "Tryptamine from indole and ethylene imine", Tryptamine Chemistry), as I found out tooPost 409562 (https://www.thevespiary.org/talk/index.php?topic=12625.msg40956200#msg40956200)
(moo: "Indole + Aziridine -> Tryptamine", Tryptamine Chemistry).