Essential Oils from Exotic Eucalyptus: Leaf Oils ofEucalyptus Youmonii, Eucalyptus Macrorhyncha, Eucalyptus Macarthuri, andEucalyptus Cinerafrom Northwest Himalays (India)

摘要

Analyses of oils obtained by hydrodistillation of foliage ofE. youmonii, E. macrorhyncha, andE. macarthurifrom India revealed that the three oils are chemically alike, but for the quantitative differences of the main components. The eudesmol (#x3B1;- and #x3B2;-) content inE. macrorhynchaandE. macarthuriis rather similar (15.38 and 18.91 respectively), but much higher inE. youmonii(50.04). The 1,8-cineol content inE. youmonii(30.70) andE. macrorhyncha(29.83) are alike while geranyl acetate (23.84) content inE. macarthuriis highest amongst the three.E. cinereaoil contains cineol (64.65), #x3B1;-terpineol (11.56) and limonene (12.51) as the major components. On the wholeE. macrorhyncha, E. macarthuriandE. cinereaoils are rich in monoterpenoids (71.16, 71.90 and 94.55) whereas that ofE. youmoniiis rich in sesquiterpenoids (53.37).