24778
Stability studies were conducted on two nonaqueous topical formulations : a polyethylene glycol ( PEG ) ointment base and an organic oleaginous base .
 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: polyethylene glycol; Chemical: PEG