3704
The biochemical assays on the influence of four analgesics on the brain concentration and turnover of noradrenaline ( NA ) were also performed .
 Chemical: noradrenaline; Chemical: NA
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: noradrenaline; Chemical: NA