15513
A new derivative of polyamidoamine and polyethylenimine , G2 . 5 - PEI 423 or G1 . 5 - PEI 423 , is prepared by an amidation reaction of PAMAM G2 . 5 or PAMAM G1 . 5 using PEI 423 .
 Chemical: polyamidoamine; Chemical: polyethylenimine; Chemical: PEI 423; Chemical: PEI 423; Chemical: PAMAM; Chemical: PAMAM; Chemical: PEI 423
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: polyamidoamine; Chemical: polyethylenimine; Chemical: PEI 423; Chemical: PEI 423; Chemical: PAMAM; Chemical: PAMAM; Chemical: PEI 423