6907
Simulations were carried out with the previously parametrized coarse - grained ( CG ) SWNT and PEG force fields that had captured the experimentally observed conformations of self - assembled SWNT - lipid complexes and phase behavior of PEG - grafted lipids .
 Chemical: PEG; Chemical: PEG
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: PEG; Chemical: PEG