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We found that lactational exposure to malation ( 200 mg / kg , body weight ( bw ) ) induced an oxidative stress status assessed by an increase in malondialdhyde ( MDA ) content , reflecting lipoperoxidation , a decrease in thiol groups ' content as well as depletion of enzyme activities as a superoxide dismutase ( SOD ) and catalase ( CAT ) on postnatal days ( Pnds ) 21 and 51 .
 Chemical: malation; Chemical: malondialdhyde; Chemical: MDA; Chemical: thiol; Chemical: superoxide
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: malation; Chemical: malondialdhyde; Chemical: MDA; Chemical: thiol; Chemical: superoxide