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The spermicide nonoxynol - 9 is a member of a homologous series of alkylphenol - ethoxylates ( polyethoxyethanols ) of general formula C9H19 - C6H6 - O - ( CH2CH2O ) n - 1 CH2CH2OH .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
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