3-Pyridinecarboxylic acid, 2,4-dimethyl-, 1-(2,3,6,7-tetrahydro-1,3,7-trimethyl-2,6-dioxo-1H-purin-8-yl)ethyl ester 56021-89-7 8-(alpha-(2,4-Dimethyl-nicotinoyloxy)-aethyl)-coffein [German]