3954
Testing type I [ N - ( 5 - chloro - 2 - hydroxyphenyl ) - N ' - [ 2 - chloro - 5 - ( trifluoromethyl ) phenyl ] ( NS1738 ) ] and type II [ 1 - ( 5 - chloro - 2 , 4 - dimethoxy - phenyl ) - 3 - ( 5 - methyl - isoxazol - 3 - yl ) ( PNU - 120596 ) ] alpha 7 nAChR PAMs in acute and persistent pain , we found that , although neither reduced acute thermal pain , only PNU - 120596 dose - dependently attenuated paw - licking behavior in the formalin test .
 Chemical: N - ( 5 - chloro - 2 - hydroxyphenyl ) - N ' - [ 2 - chloro - 5 - ( trifluoromethyl ) phenyl; Chemical: NS1738; Chemical: 1 - ( 5 - chloro - 2 , 4 - dimethoxy - phenyl ) - 3 - ( 5 - methyl - isoxazol - 3 - yl ); Chemical: PNU - 120596; Chemical: PNU - 120596; 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: N - ( 5 - chloro - 2 - hydroxyphenyl ) - N ' - [ 2 - chloro - 5 - ( trifluoromethyl ) phenyl; Chemical: NS1738; Chemical: 1 - ( 5 - chloro - 2 , 4 - dimethoxy - phenyl ) - 3 - ( 5 - methyl - isoxazol - 3 - yl ); Chemical: PNU - 120596; Chemical: PNU - 120596; Chemical: formalin