26144
The results revealed that the spherical nanoparticles formed from PEO45 - b - PtNEA44 dissociated faster than the polymersomes of PEO45 - b - PtNEA172 , and both aggregates showed an enhanced hydrolysis under acidic conditions .
 Chemical: PEO45; Chemical: PEO45
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: PEO45, PEO45 
Answer:
 Chemical: PEO45; Chemical: PEO45