15282
Reactive oxygen species are produced as side products of oxygen utilization and can lead to the oxidation of nucleic acids and their precursor nucleotides .
 Chemical: oxygen; Chemical: oxygen; Chemical: nucleotides
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: oxygen; Chemical: oxygen; Chemical: nucleotides