22358
An amphiphilic diblock copolymer poly ( acrylamidoethylamine ) 90 - block - poly ( dl - lactide ) 40 ( PAEA90 - b - PDLLA40 ) was synthesized , self - assembled in aqueous solution , and shell cross - linked using a hydrolyzable cross - linker to afford deg - cSCKs with an average core diameter of 45 +/- 7 nm .
 Chemical: poly ( acrylamidoethylamine ) 90 - block - poly ( dl - lactide ) 40; Chemical: PAEA90 - b - PDLLA40
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
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Answer:
 Chemical: poly ( acrylamidoethylamine ) 90 - block - poly ( dl - lactide ) 40; Chemical: PAEA90 - b - PDLLA40