3668
Low - molecular - weight CXCR4 ligands based on known lead compounds including the 14 - mer peptide T140 , the cyclic pentapeptide FC131 , peptide mimetics , and dipicolylamine - containing compounds were designed and synthesized .
 cyclic pentapeptide, FC131, dipicolylamine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 cyclic pentapeptide, FC131, dipicolylamine