22072
The lowest levels of peroxide value ( PV ) , thiobarbituric acid reactive substances ( TBARs ) , cholesterol oxidation products ( COPs ) and the highest level of polyunsaturated fatty acids ( PUFAs ) content , especially PUFA n - 3 , were found in the untreated sardines ( time zero ) .
 Chemical: peroxide; Chemical: thiobarbituric acid; Chemical: cholesterol; Chemical: polyunsaturated fatty acids; Chemical: PUFAs; Chemical: PUFA n - 3
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: peroxide; Chemical: thiobarbituric acid; Chemical: cholesterol; Chemical: polyunsaturated fatty acids; Chemical: PUFAs; Chemical: PUFA n - 3