4488
The lipophilic extracts were also found to prevent cell death in a cell - based model system using cardiac H9c2 cells and H ( 2 ) O ( 2 ) , via attenuation of the caspase - 3 and matrix metalloproteinase - 2 activities .
 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 )