17046
For potential clinical applications , further refinement to obtain Re 2 - arylbenzothiazoles with better binding affinities ( < 10nM ) will likely be needed .
 Re 2 - arylbenzothiazoles
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Re 2 - arylbenzothiazoles