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The structures of three new compounds were elucidated by spectroscopic methods including 1 - D NMR , 2 - D NMR and MS spectrums , and their anticancer activities were evaluated by MTT method .
 Chemical: MTT
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: MTT 
Answer:
 Chemical: MTT