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The 95% ethanol extract of Curcuma longa was subjected to isolation and purification using silica gel column chromatography, C18 column chromatography, and semi-preparative HPLC. The planar structures of the isolated compounds were elucidated by HR-MS, IR, and NMR spectroscopy. The absolute configurations of the new compounds were determined by calculated electronic circular dichroism (ECD) and DP4+ NMR analysis. Finally, three bisabolane-type sesquiterpenoids were isolated and identified from C. longa as (1R,7S)-15-norbisabolane-2-ene-11-ol-4,9-dione (1), (7S)-15-norbisabolane-1,3,5,10-tetraene-4-ol (2), and 8-hydroxyl-ar-turmerone (3). Compounds 1 and 2 were two novel 15-norbisabolane-type sesquiterpenoids.
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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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