4782
However , compared with that in NMS rats without KT , there was no apparent difference of 5 - HT level from brain issue in the rats with various doses .
 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: 5 - HT