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We have now developed an isotope - dilution , liquid chromatography - coupled , tandem quadrupole mass spectrometric method to quantify representative species across the spectrum of RNA damage products predicted to arise at sites of inflammation , including nucleobase deamination ( xanthosine and inosine ) , oxidation ( 8 - oxoguanosine ) , and alkylation ( 1 , N ( 6 ) - ethenoadenosine ) .
 Chemical: nucleobase; Chemical: xanthosine; Chemical: inosine; Chemical: 8 - oxoguanosine; Chemical: 1 , N ( 6 ) - ethenoadenosine
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: nucleobase; Chemical: xanthosine; Chemical: inosine; Chemical: 8 - oxoguanosine; Chemical: 1 , N ( 6 ) - ethenoadenosine