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It should be noted that the adverse clinical effects may be due to other ingredients in the DMAA - containing products , such as caffeine .
 Chemical: DMAA; Chemical: caffeine
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: DMAA; Chemical: caffeine