11139
3 , 17 beta - Hydroxysteroid dehydrogenase ( 3 , 17 beta - HSD ) from C . testosteroni is a member of the short - chain dehydrogenase / reductase ( SDR ) superfamily and a key enzyme in steroid degradation .
 3 , 17 beta - Hydroxysteroid, steroid
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 3 , 17 beta - Hydroxysteroid, steroid