25620
Both BPA and BPAF antagonized AR function via competitive inhibition of the action of synthetic androgen R1881 .
 BPA, BPAF, androgen, R1881
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 BPA, BPAF, androgen, R1881