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The volatile composition of 10 endemic Cephalaria ( Dipsacaceae ) species ( Cephalaria gazipashensis , Cephalaria lycica , Cephalaria paphlagonica , Cephalaria elmaliensis , Cephalaria stellipilis , Cephalaria scoparia , Cephalaria isaurica , Cephalaria cilicica , Cephalaria elazigensis var . purpurea and Cephalaria davisiana ) was investigated .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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