9541
By Calcein - AM / PI staining , BPA - f treatment was specific toward SH - SY5Y cells only : a dose - dependent cell density reduction was observed , with a more pronounced effect after 48h exposure ( 15 - 40 % at doses ranging 20 - 100 mu gBeq / ml ) .
 Calcein - AM, BPA - f
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Calcein - AM, BPA - f