3711
It is suggested that in rats the brain NA plays a less important function than the other monoamines in the behavioural activity of potent analgesics .
 Chemical: NA; Chemical: monoamines
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: NA; Chemical: monoamines