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The c ( RGDfK ) modified micelles assembled from PCL - b - PEO diblock copolymers developed in this study are of great potentials as nano - scaled drug delivery system for intravesical instilled chemotherapy of superficial bladder cancer .
 Chemical: PCL - b - PEO
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: PCL - b - PEO