21316
RATIONALE : Treatment with a carbon monoxide - releasing molecule ( tricarbonyldichlororuthenium ( II ) dimer , CORM - 2 ) or a classical heme oxygenase 1 inducer ( cobalt protoporphyrin IX , CoPP ) has potent anti - inflammatory effects , but the role played by these treatments in the antinociceptive effects of morphine during acute and chronic pain was not evaluated .
 Chemical: carbon monoxide; Chemical: tricarbonyldichlororuthenium ( II ); Chemical: CORM - 2; Chemical: cobalt protoporphyrin IX; Chemical: CoPP; Chemical: morphine
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: carbon monoxide; Chemical: tricarbonyldichlororuthenium ( II ); Chemical: CORM - 2; Chemical: cobalt protoporphyrin IX; Chemical: CoPP; Chemical: morphine