25686
Cosinor analysis indicated no diurnal rhythm of Ppar gamma expression in the livers of diabetic STZ or Iddm rats or in those of insulin - substituted Iddm rats .
 Chemical: STZ
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: STZ