27650
Adult female SD rats were made hypothyroid by seven weeks treatment with the anti - thyroid drug PTU ( 6 - n - propyl - 2 - thiouracil ) .
 Chemical: PTU; Chemical: 6 - n - propyl - 2 - thiouracil
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: PTU, 6 - n - propyl - 2 - thiouracil 
Answer:
 Chemical: PTU; Chemical: 6 - n - propyl - 2 - thiouracil