2664
' Ninghaibai ' fruit had higher levels of glucose and fructose and higher activities of sucrose hydrolyzing enzymes , such as sucrose synthase - cleavage and invertase , than had ' Dahongpao ' .
 glucose, fructose, sucrose, sucrose
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 glucose, fructose, sucrose, sucrose