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In order to study the chemical composition of Osmanthus fragrans var. thunbergii, the chemical constituents of the dried flower of O. fragrans var. thunbergii were studied. From the 95% ethanol extract of the dried flower, a new monoterpene (1), along with seven known monoterpenes, sesquiterpenes and phenethyl alcohols (2-8), was isolated and purified by silica gel, polyamide, and preparative reversed-phase HPLC chromatography methods. Their structures were identified by 1D-NMR (1H NMR, 13C NMR, DEPT), 2D-NMR (HSQC, HMBC, 1H-1H COSY, NOESY), HR-ESI-MS, IR, UV, and its physical and chemical properties as: methyl (R, E)-2-(5-ethylidene-2-oxotetrahydro-2H-pyran-4-yl) acrylate (1), (R, E)-2, 6-dimethyloct-3, 7-dien-2, 6-diol (2), (6R)-2, 6-dimethyloct-7-en-2, 3, 6-triol (3), 2, 4, 4-trimethyl-3-(3-oxobutyl)-cyclohex-2-en-1-one (4), (S)-2, 4, 4-trimethyl-3-(3-hydroxybutyl)-cyclohex-2-en-1-one (5), (R, E)-2, 4, 4-trimethyl-3-(3-hydroxybut-1-en-1-yl)-cyclohex-2-en-1-one (6), (S, E)-3, 5, 5-trimethyl-4-hydroxy-4-(3-oxobut-1-en-1-yl)-cyclohex-2-en-1-one (7), and 2-p-acetoxyphenylethanol (8). 1 is a new compound, 2-8 were isolated from the plant of Osmanthus fragrans var. thunbergii for the first time.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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