10798
The measured IRMPD action spectra of all four deprotonated DNA mononucleotides exhibit unique spectral features in the region extending from ~ 600 to 1800 cm ( - 1 ) such that they can be readily differentiated from one another .
 mononucleotides
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 mononucleotides