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 .
 PEO45, PEO45
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 PEO45, PEO45