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The ethanol extract of Pteris multifida was isolated and purified using various column chromatographic methods, including silica gel, Sephdex LH-20 and semi-preparative HPLC. Based on the physicochemical properties of the isolated compounds, their structures were elucidated by spectroscopic data such as MS, NMR, and CD. From the ethyl acetate fraction of P. multifida,18 terpenoids were isolated, including 14 sesquiterpenoids possessing a 1H-inden-1-one nucleus (1-14) and four nortriterpenoids with a megastigmane skeleton (15-18). They were identified as (2S,3S)-2,5,7-trimethyl-3-hydroxyl-6-carboxyl-indan-1-one (ptemulic A) (1), (2S,3S)-2,7-dimethyl-5,6-dihydroxymethyl-indan-1-one (ptemulinol A) (2), dehydropterosin B (3), 6-(1,2-dihydroxyethyl)-2,5,7-trimethyl-indan-1-one (4), pterosin D (5), (3R)-pterosin (6), pterosin D 3-O-β-D-glucopyranoside (7), (3R)-pteroside W (8), (3R)-pteroside D (9), 14-acetyl-pterosin A (10), pterosin A (11), 11-acetyl-pterosin A (12), pterosin A2 (13), (2S,3S)-pterosin C 3-O-β-D-glucopyranoside (14), dearabinosyl pneumonanthoside (15), grasshopper ketone (16), vomifoliol (17), roseoside Ⅰ (18). Compounds 1 and 2 were new compounds, while compounds 3, 4, 10-13, 16 and 18 were isolated from this plant for the first time. New compounds 1 and 2 showed anti-inflammatory activity by inhibiting the production of nitric oxide (NO), with IC50 values of 36.7 and 61.2 μmol·L-1, respectively.
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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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