26099
Four groups of male Wistar rats were used : U - NX , NDGA , I / R , and I / R + NDGA .
 Chemical: NDGA; Chemical: NDGA
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: NDGA; Chemical: NDGA