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The tested liposomes caused no or only mild ( 30 % ) activation of C except for one formulation wherein the PEG2000 was anchored to cholesterol ( CHOL - PEG2000 ) .
 Chemical: PEG2000; Chemical: cholesterol; Chemical: CHOL - PEG2000
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: PEG2000; Chemical: cholesterol; Chemical: CHOL - PEG2000