11208
To establish proof of concept , microparticles were prepared with PLGA [ poly ( d , l - lactide - co - glycolide ) , 50 : 50 , MW . 7000 - 17000 ] , hydroxypropyl methyl cellulose ( HPMC ) , and DXM by oil - in - water emulsion / solvent evaporation technique .
 Chemical: PLGA; Chemical: poly ( d , l - lactide - co - glycolide ); Chemical: hydroxypropyl methyl; Chemical: DXM
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: PLGA; Chemical: poly ( d , l - lactide - co - glycolide ); Chemical: hydroxypropyl methyl; Chemical: DXM