28717
The first route includes the interaction of D - glucose with the spilled - over hydrogen supplied by the catalyst ; the second one includes classical interaction of the sorbed substrate with incident hydrogen from the reaction medium .
 D - glucose, hydrogen, hydrogen
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 D - glucose, hydrogen, hydrogen