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The data for the pure ketones and ketone - based electrolytes are compared with analogous data for pure n - alkyl acetates and n - alkyl acetate - based electrolytes .
 Chemical: ketones; Chemical: ketone; Chemical: n - alkyl acetates; Chemical: n - alkyl acetate
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: ketones; Chemical: ketone; Chemical: n - alkyl acetates; Chemical: n - alkyl acetate