..clouds..was it in Italy by Vitali & Mossini in 1959?..i don't have the paper [ Vitali T. & Mossim, F. (1959). Preparation of some N-substituted tryptamines. Boll. sci. Fac. chim. Ind. Bologna  ], but it is referred to along with DPT in this very interesting chemistry paper on tryptamine derivatives from the UK military in 1964 which i have attached for members..