21929
At 75 degrees C , organic peroxides ( ROOH ) were less oxidative than hydrogen peroxide ( H2O2 ) , and antioxidant enzymes were less efficient than vitamin E and carnosine at protecting proteins against oxidation .
 organic peroxides, ROOH, hydrogen peroxide, H2O2, vitamin E, carnosine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 organic peroxides, ROOH, hydrogen peroxide, H2O2, vitamin E, carnosine