22026
Furthermore , SFRE sensitizes 5 - FU - resistant cells to the therapeutic activity of this drug , constituting a beneficial agent against both 5 - FU sensitive and resistant tumor cells .
 Chemical: 5 - FU; Chemical: 5 - FU
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: 5 - FU; Chemical: 5 - FU