14113
The results are in favor of a participation of both system since pretreatment , 20 min before injection of the CF3 - ( MIF - 1 ) 2 , with the non - competitive antagonist of opiate receptors naloxone , the nitric oxide synthase ( NOS ) inhibitor l - N ( G ) - nitroarginine ester ( l - NAME ) or the nitric oxide ( NO ) donor l - arginine ( l - Arg ) significantly decreased the pain perception in PP and HP tests .
 Chemical: CF3 - ( MIF - 1 ); Chemical: naloxone; Chemical: nitric oxide; Chemical: l - N ( G ) - nitroarginine ester; Chemical: l - NAME; Chemical: nitric oxide; Chemical: NO; Chemical: l - arginine; Chemical: l - Arg
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: CF3 - ( MIF - 1 ); Chemical: naloxone; Chemical: nitric oxide; Chemical: l - N ( G ) - nitroarginine ester; Chemical: l - NAME; Chemical: nitric oxide; Chemical: NO; Chemical: l - arginine; Chemical: l - Arg