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After 28 days of feeding , the testosterone level in the testis was significantly higher and the plasma corticosterone level was significantly lower in rats fed the 40 % casein diet with oleuropein than in those fed the same diet without oleuropein .
 Chemical: testosterone; Chemical: corticosterone; Chemical: oleuropein; Chemical: oleuropein
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: testosterone; Chemical: corticosterone; Chemical: oleuropein; Chemical: oleuropein