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In this study , we investigated the antinociceptive effect of 7 - methoxyflavone ( 7MF ) in mice using the following tests : acetic acid - induced writhing , glutamate - and formalin - induced nociception and hotplate .
 Chemical: 7 - methoxyflavone; Chemical: 7MF; Chemical: acetic acid; Chemical: glutamate; Chemical: formalin
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: 7 - methoxyflavone; Chemical: 7MF; Chemical: acetic acid; Chemical: glutamate; Chemical: formalin