8777
Vasorelaxing effects and inhibition of nitric oxide in macrophages by new iron - containing carbon monoxide - releasing molecules ( CO - RMs ) .
 Chemical: nitric oxide; Chemical: iron; Chemical: carbon monoxide
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: iron; Chemical: carbon monoxide