The chemical constituents of Stellera chamaejasme L. were separated by comprehensive column chromatography on MCI, ODS C-18, Toyopearl HW-40C, and silica gels. Structures of the isolated compounds were determined by NMR (nuclear magnetic resonance), MS (mass spectrometry), IR (infrared spectroscopy), and quantum chemical calculations. Nine compounds were isolated from the chloroform fraction 95% ethanol extract of the titled plant and identified as chamaejaslactone A (1), stelleranoid A (2), stelleranoid D (3), stelleranoid E (4), wikstronone A (5), wikstronone C (6), chamaejasmone D (7), daphnauranol A (8), and holosericin B (9), respectively. Among them, compound 1 was characterized as the first example of a sesquiterpenoid with an unprecedented 7,8-seco-guaiane skeleton. In the in vitro bioassay, compound 1 exhibited moderate inhibitory activity against Escherichia coli-originated β-glucuronidase with an IC50 value of 51.79 ± 3.21 μmol·L-1.
| 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 |