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The metabolic profile of MTX was assessed after incubation of 100 mu M MTX with hepatic S9 fraction isolated from rats .
 Chemical: MTX; Chemical: MTX
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: MTX; Chemical: MTX