Eight monoterpenic hydrocarbons, 15 sesquiterpenic hydrocarbons, 6 aliphatic aldehydes, 1 aromatic aldehyde, 3 terpenic aldehydes, 1 terpenic ketone, 1 aliphatic ketone, 1 phenol, 1 phenol ether, 8 terpenic esters, 3 aliphatic alcohols, 9 monoterpenic alcohols, 9 sesquiterpenic alcohols, 1 aromatic alcohol, 5 fatty acids and 2 coumarin compounds were identified in cold-pressed peel oil of Yuzu (Citrus junos) based on gas chromatography, infrared spectrometry, nuclear magnetic resonance spectrometry and capillary GLC connected with fast-scan mass spectrometry. Structures of the sesquiterpenic hydrocarbons, γ-elemene and bicycloelemene are discussed.
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Shinoda et al. (1970) studied this question.