21317
OBJECTIVES : In wild type ( WT ) , neuronal ( NOS1 - KO ) , or inducible ( NOS2 - KO ) nitric oxide synthases knockout mice , we evaluated the effects of CORM - 2 and CoPP treatments in the antinociceptive actions of morphine and their interaction with nitric oxide during acute , visceral , and chronic inflammatory or neuropathic pain .
 Chemical: nitric oxide; Chemical: CORM - 2; Chemical: CoPP; Chemical: morphine; Chemical: nitric oxide
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: nitric oxide; Chemical: CORM - 2; Chemical: CoPP; Chemical: morphine; Chemical: nitric oxide