11566
L . johnsonii feeding resulted in a 17 % reduction in serum kynurenine compared with that in vehicle - fed controls , correlating with a 1 . 4 - fold elevation in 5 - HT levels .
 Chemical: kynurenine; Chemical: 5 - HT
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: kynurenine; Chemical: 5 - HT