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Nanoparticles of poly ( d , l - lactide - co - glycolide ) , poly ( d , l - lactide ) and polyethylene glycol - block - poly ( d , l - lactide ) were developed to encapsulate chloroaluminium phthalocyanine ( AlClPc ) , a new hydrophobic photosensitiser used in photodynamic therapy ( PDT ) .
 Chemical: poly ( d , l - lactide - co - glycolide ); Chemical: poly ( d , l - lactide ); Chemical: polyethylene glycol - block - poly ( d , l - lactide ); Chemical: chloroaluminium phthalocyanine; Chemical: AlClPc
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 ( d , l - lactide - co - glycolide ); Chemical: poly ( d , l - lactide ); Chemical: polyethylene glycol - block - poly ( d , l - lactide ); Chemical: chloroaluminium phthalocyanine; Chemical: AlClPc