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In contrast , S - adenosylhomocysteine , putrescine , and spermidine were increased in db / db mice .
 Chemical: S - adenosylhomocysteine; Chemical: putrescine; Chemical: spermidine
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: S - adenosylhomocysteine; Chemical: putrescine; Chemical: spermidine