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Folic acid modified cationic gamma - cyclodextrin - oligoethylenimine star polymer with bioreducible disulfide linker for efficient targeted gene delivery .
 Chemical: Folic acid; Chemical: gamma - cyclodextrin; Chemical: oligoethylenimine; Chemical: disulfide
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: Folic acid; Chemical: gamma - cyclodextrin; Chemical: oligoethylenimine; Chemical: disulfide