Kornpointner, C., Berger, A., Traxler, F., Hadžiabdić, A., Massar, M., Matek, J., Brecker, L., Schinnerl, J., 2020. Alkaloid and Iridoid Glucosides from Palicourea luxurians (Rubiaceae: Palicoureeae) Indicate Tryptamine and Tryptophan Iridoid Alkaloid F