13568
The oxidative stress in erythrocyte membrane demonstrated the highly protective effect of compounds ( 4 ) , ( 5 ) and ( 6 ) and high antioxidant / pro - oxidant activity in relation to the concentrations of compounds ( 1 ) and ( 3 ) .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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