The white pulp of the cupuaÃ u is uniquely fragrant . It contains theacrine ( 1,3,7,9-tetramethyluric acid ) instead of the xanthines ( caffeine , theobromine , and theophylline ) found in cacao . The white pulp of the cupuaÃ u is uniquely fragrant ( described as a mix of chocolate and pineapple ) , and it contains theacrine ( 1,3,7,9-tetramethyluric acid ) instead of the xanthines ( caffeine , theobromine , and theophylline ) found in cacao .