20887
Ring - contracted metabolites accounted for 25 % of the total metabolism in the rat for ( S ) - 25 , whereas the contribution was much smaller for AZD3839 .
 Chemical: AZD3839
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: AZD3839