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Multi - target methodologies focused on quantitative - structure activity relationships ( mt - QSAR ) have played a very important role for the rationalization of drug design , providing a better understanding about the molecular patterns related with diverse pharmacological profiles including antimicrobial activity .
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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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