25619
As seen in African green monkey kidney CV1 cells , the present study confirmed that BPA and BPAF act as ER alpha agonists ( half maximal effective concentration EC50 of 10 - 100nM ) and as AR antagonists ( half maximal inhibitory concentration IC50 of 1 - 2 mu M ) .
 BPA, BPAF
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 BPA, BPAF