5473
In this work we proposed a model for in vitro interaction of fenitrothion ( FEN ) with calf thymus - DNA by combination of multispectroscopic and two dimensional molecular modeling ( ONIOM ) methods .
 fenitrothion, FEN
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 fenitrothion, FEN