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Synthesis and Structure - Activity Relationships of N - Methyl - 5 , 6 , 7 - trimethoxylindoles as Novel Antimitotic and Vascular Disrupting Agents .
 Chemical: N - Methyl - 5 , 6 , 7 - trimethoxylindoles
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: N - Methyl - 5 , 6 , 7 - trimethoxylindoles