23429
This research provided informative data that the impaired tryptophan metabolism might be one of the important reasons in elucidating the biochemical basis of the febrile response .
 Chemical: tryptophan
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: tryptophan