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The flower volatile compounds ( FVCs ) of two tetraploid Freesia hybrida ( pink - yellow and yellow ) cultivars and their cut flowers were analysed by headspace solid - phase microextraction combined with gas chromatography - mass spectrometry .
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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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