7342
Antimicrobial activity against gram - negative E . coli and P . aeruginosa as well as C . albicans depended only on the degree of hydrolysis , while antimicrobial activity against gram - positive S . aureus was only observed for hydrolyzed poly ( 2 - nonyl - 2 - oxazoline ) s .
 poly ( 2 - nonyl - 2 - oxazoline ) s
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 poly ( 2 - nonyl - 2 - oxazoline ) s