27650
Adult female SD rats were made hypothyroid by seven weeks treatment with the anti - thyroid drug PTU ( 6 - n - propyl - 2 - thiouracil ) .
 PTU, 6 - n - propyl - 2 - thiouracil
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 PTU, 6 - n - propyl - 2 - thiouracil