Answer:
Since the formula for glucose is C6H12O6 and hydrogen cyanide HCN simply crack the sugar molecule in a fashion that leaves only one hydrogen attached to each carbon and insert a nitrogen into the molecule to take up the open bonding sites.
Alternately hydrogenate the sugar to form methane. Then react the methane with ammonia and air over a platinum/rhodium catalyst. This is of course the Andrussow process.