8051
Poly ( ethylene glycol ) - block - poly ( epsilon - caprolactone ) ( PEG - b - PCL ) micelles were loaded with paclitaxel ( cytotoxic agent ) , cyclopamine ( hedgehog inhibitor ) , and gossypol ( Bcl - 2 inhibitor ) .
 Chemical: Poly ( ethylene glycol ) - block - poly ( epsilon - caprolactone ); Chemical: PEG - b - PCL; Chemical: paclitaxel; Chemical: cyclopamine; Chemical: gossypol
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: Poly ( ethylene glycol ) - block - poly ( epsilon - caprolactone ); Chemical: PEG - b - PCL; Chemical: paclitaxel; Chemical: cyclopamine; Chemical: gossypol