21317
Its effects were not due to its bioconversion back to 5 alpha - DHP , which can activate gene transcription via PR , because they were still observed in slices from knockout PR ( - / - ) mice .
 Chemical: 5 alpha - DHP
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 alpha - DHP