17306
Results showed that the content of ascorbic acid and glutathione in broccoli degraded during storage at 23 degrees C , for at least 4 . 5 - fold after 6 days of storage .
 ascorbic acid, glutathione
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 ascorbic acid, glutathione