1825
IKK - beta and p85 S6K1 contributed to H ( 2 ) O ( 2 ) - induced phosphorylation of Mdm2 ( S166 ) and p53 accumulation .
 H ( 2 ) O ( 2 )
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 H ( 2 ) O ( 2 )