25275
The petroleum ether and ethyl acetate fractions were found to have significant inhibition effects on NO production and NF - kappa B luciferase activity in macrophage RAW 264 . 7 cells and cytotoxicity against human prostatic carcinoma cell PC3 and breast carcinoma cell MDA - MB - 231 .
 petroleum ether, ethyl acetate, NO
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 petroleum ether, ethyl acetate, NO