29990
In contrast , in spite of the long treatment period , beta cell area was not significantly different between vildagliptin - treated mice and controls .
 Chemical: vildagliptin
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: vildagliptin