15894
These 3 beta - HSD ( pos ) cells were not stained by the antibody against 11 beta - hydroxysteroid dehydrogenase 1 ( 11 beta - HSD1 ) , a marker for Leydig cells at a more advanced stage .
 11 beta - hydroxysteroid
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 11 beta - hydroxysteroid