16573
Similar products were also formed when the VP - 16 radical , generated from VP - 16 and horseradish peroxidase / H2O2 , was exposed directly to ( . ) NO in chloroform in the presence of oxygen .
 VP - 16, VP - 16, H2O2, ( . ) NO, chloroform, oxygen
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 VP - 16, VP - 16, H2O2, ( . ) NO, chloroform, oxygen