8052
After physicochemical studies focusing on combination drug solubilization , 3 - drug PEG - b - PCL micelles were evaluated in vitro in 2 - D and 3 - D cell culture and in vivo in xenograft models of ovarian cancer , tracking bioluminescence signals from ES - 2 and SKOV3 human ovarian cancer cell lines after IP injection .
 Chemical: PEG - b - PCL
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: PEG - b - PCL