The volatile oil in flowers of Dendranthema morifolium (Ramat) Tzvel. cv. Gongju was extracted with steam distillation, the constituents and contents of volatile oil were analyzed by means of GC-MS-DS techniques. The result shows that the principle constituents of the volatile oil are bicyclo[3.1. 1]hept-2-en-4-ol, 2,6,6-trimethyl-, acetate (39.64%); benzene, 1-( 1,5-dimethyl-4-hexenyl)-4-methyl-,2-heptene (5.24%);n-hexadecanoic acid (4.77%); cis-lanceol (4.73%) ; acetic acid,1,7, 7-trimethyl-bicyclo [2.2.1] hept-2-yl-ester (3.95%); (-) spathulenol (3.38%) ; 2, 4, 6-trimethyl-3-cyclohexene-1-carboxaldehyde(3.22%) ; caryophyllene oxide (2.88%) ; 1,2,3,4, 5,6,7,8-octahydro-1,4-dimethyl-7-(1-methylethenyl)-,azulene (2. 80%); 3-(1, 5-dimethyl-4-hexenyl)-6-methylene, cyclohexaene (2. 50%); decahydro-1, 4a-dimethyl-7-( 1-methylidene)-,1-naphthalenol(2.39%);1,1,2-trimethyl-3,5-bis(1-methylethenyl)-,cyclohexane(2.23% ), etc.
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