11516
Phenyl , propyl , and amyl moieties were used as linkers between SAK and polyethylene glycol ( PEG ) , respectively .
 Chemical: Phenyl; Chemical: propyl; Chemical: amyl; Chemical: polyethylene glycol; 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: Phenyl; Chemical: propyl; Chemical: amyl; Chemical: polyethylene glycol; Chemical: PEG