17656
Thus , pH - sensitive polyvinylpyrrolidone - poly ( acrylic acid ) ( PVP / PAAc ) nanogels prepared by gamma radiation - induced polymerization of acrylic acid ( AAc ) in an aqueous solution of polyvinylpyrrolidone ( PVP ) as a template polymer were used to encapsulate pilocarpine .
 Chemical: polyvinylpyrrolidone; Chemical: poly ( acrylic acid ); Chemical: PVP; Chemical: PAAc; Chemical: acrylic acid; Chemical: AAc; Chemical: polyvinylpyrrolidone; Chemical: PVP; Chemical: pilocarpine
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: polyvinylpyrrolidone; Chemical: poly ( acrylic acid ); Chemical: PVP; Chemical: PAAc; Chemical: acrylic acid; Chemical: AAc; Chemical: polyvinylpyrrolidone; Chemical: PVP; Chemical: pilocarpine