6138
The self - assembly of the aliphatic biodegradable copolyester PBS / PBDL ( poly ( butylene succinate - co - butylene dilinoleate ) ) and HPMA - based copolymers ( N - ( 2 - hydroxypropyl ) methacrylamide - based copolymers ) hydrophobically modified by the incorporation of cholesterol led to the formation of narrow - size - distributed ( PDI < 0 . 10 ) sub - 200 - nm polymeric nanoparticles suitable for passive tumor - targeting drug delivery based on the size - dependent EPR ( enhanced permeability and retention ) effect .
 Chemical: PBS; Chemical: PBDL; Chemical: poly ( butylene succinate - co - butylene dilinoleate ); Chemical: HPMA; Chemical: N - ( 2 - hydroxypropyl ) methacrylamide; Chemical: cholesterol
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: PBS; Chemical: PBDL; Chemical: poly ( butylene succinate - co - butylene dilinoleate ); Chemical: HPMA; Chemical: N - ( 2 - hydroxypropyl ) methacrylamide; Chemical: cholesterol