Purine alkaloid formation in buds and developing leaflets of Coffea arabica: Expression of an optimal defence strategy? Frischknecht, Peter M. ; Ulmer-Dufek, Jindra ; Baumann, Thomas W. Abstract Publication: Phytochemistry Pub Date: January 1986 DOI: 10.1016/0031-9422(86)88009-8 Bibcode: 1986PChem..25..613F