- Analytical chemistry of synthetic routes to psychoactive tryptamines. Part I. Characterisation of the Speeter and Anthony synthetic route to 5-methoxy-N,N-diisopropyltryptamine using ESI-MS-MS and ESI-TOF-MS. Brandt, S.D., Freeman, S., Fleet, I.A., McGagh, P., Alder, J.F. The Analyst. (2004)