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The purpose of this work is to prepare a nanoparticulate drug delivery system of donepezil using poly ( lactic - co - glycolic acid ) ( PLGA ) for sustained release and efficient brain targeting .
 Chemical: donepezil; Chemical: poly ( lactic - co - glycolic acid ); Chemical: PLGA
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: donepezil; Chemical: poly ( lactic - co - glycolic acid ); Chemical: PLGA