19268
Na2S2O5 administration significantly elevated total oxidant status ( TOS ) levels while depleting total antioxidant status ( TAS ) levels in gastric mucosa .
 Chemical: Na2S2O5
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: Na2S2O5