22484
Methods The acetic acid - induced writhing test and the paw - licking test , in which paw licking was induced by glutamate and formalin , were performed to evaluate the antinociceptive action of CAT and to determine the involvement of PKC , PKA , TRPV1 , TRPA1 , TRPM8 and ASIC in its antinociceptive mechanism .
 Chemical: acetic acid; Chemical: glutamate; Chemical: formalin; Chemical: CAT
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: acetic acid; Chemical: glutamate; Chemical: formalin; Chemical: CAT