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In all cases , oleyl chains were predominant , and high amounts of polyunsaturated fatty acid chains were observed .
 Chemical: oleyl; Chemical: polyunsaturated fatty acid
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: oleyl; Chemical: polyunsaturated fatty acid