Indolic compounds in the leaves of Tecoma stans

Indole, tryptophan, tryptamine and skatole were isolated from the leaves of Tecoma stans. Anthranilic acid was also identified in its free form, in contrast to its glucoside, in Jasminum grandiflorum. The presence of both indole and anthranilic acid in the leaves of Tecoma stans indicates that they are the true substrate and product of indole oxygenase from the leaves of Tecoma stans.