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Finally , whereas 5 - HT - LI was sparsely observed in the adrenal cortex of CTRL animals , it strongly increased in the adrenal cortex of CRS animals .
 5 - HT
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 5 - HT