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The emergence of metabolomics , defined as the comprehensive analysis of all metabolites in a system , is still recent compared to other " omics " fields , but its particular features and the improvement of both analytical techniques and pattern recognition methods has contributed greatly to its increasingly use .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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