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金櫻根化學成分的研究

2017-04-29 00:00:00丁陽黃永林劉金磊王磊顏小捷李典鵬
廣西植物 2017年2期

摘要: 金櫻根為三金片的主要成分,但目前對于金櫻根的化學成分和藥理作用研究甚少。為了闡明金櫻根的物質基礎和生物活性,該研究采用硅膠、Sephadex LH20、MCI gel CHP 20P 等柱色譜以及HPLC半制備等方法,對金櫻根(Rosa laevigata)的化學成分進行研究。結果表明:從中共分離得到9個化合物,經過波譜數據分析結合文獻對照分別鑒定為兒茶素(1),表兒茶素(2),rosamultin(3),sericoside(4),2α,3α,19α,23tetrahydroxyurs12en28oic acid3OβDglucopyranosyl ester(5),kajiichigoside F1(6),βDGlucopyranosyl 3β,19αdihydroxy2oxours12en28oate(7),胡蘿卜苷(8),β谷甾醇(9),其中化合物2、4、5、7為首次從該植物中分離得到。該研究結果為金櫻根在功能醫藥領域的開發利用提供了理論依據。

關鍵詞: 金櫻根, 化學成分, 結構鑒定

中圖分類號: Q946.8文獻標識碼: A文章編號: 10003142(2017)02025505

Abstract: The roots of Rosa laevigata were the main ingredients of the Sanjin tablet, at present, the studies on the chemical constituents and pharmacological of the R. laevigata were relatively insufficient. In order to elucidate the material basis and the activity of R. laevigata, the constituents of R. laevigata were isolated by silica gel, Sephadex LH20, MCI gel CHP 20P column chromatography and semipreparative HPLC. Their structures were elucidated by anlalyzing their spectral data and comparing with the previously reported literatures. Nine compounds: (+)catechin (1), ()epicatechin (2), rosamultin (3), sericoside (4), 2α, 3α, 19α, 23tetrahydroxyurs12en28oic acid3OβDglucopyranosyl ester (5), kajiichigoside F1 (6), βDGlucopyranosy 3β,19αdihydroxy2oxours12en28oate (7), daucosterol (8), βsitosterol (9) were obtained. Compounds (2), (4), (5) and (7) were reported from the plant for the first time. The results provide scientific information for exploitation and medicine utilization of R. laevigata.

Key words: roots of Rosa laevigata, chemical constituents, structure identification

中藥金櫻子(Rosa laevigata)為薔薇科薔薇屬灌木植物,主要分布于我國華東、中南、西南等地。《本草綱目》中記載:金櫻子,性酸、澀、平、無毒;主治脾瀉下痢、止小便利、澀精氣。研究表明,金櫻子具有抗氧化、保護腎臟肝臟、降低血糖血脂、抗菌抗病毒、增強抗炎以及增強免疫力的作用。

國內外學者從金櫻子的果實中和葉中已經分離純化得到了甾體及甾體皂苷類、三萜及三萜皂苷類、木脂素、黃酮、可水解鞣質、多糖等多種化學成分。但對于金櫻地下部分的物質基礎研究不多,為了更全面地掌握金櫻根的藥效物質基礎,本研究運用現代分離手段和鑒定技術,從金櫻根60%乙醇提取物乙酸乙酯萃取部位分離得到化合物9個。

1材料與方法

1.1 儀器與材料

儀器:瑞士Bruker DRX500 MHz 超導核磁共振儀;N1100旋轉蒸發儀;CF810C冷卻循環水;硅膠薄層板F254 (0.2 mm thick Merck KGaA Darmstadt, Germany); MCI gel CHP 20P (70~150 μm; Mitsubishi Chemical; Tokyo, Japan); Sephadex LH20(25~100 μm, GE Healtheare Bioscience AB, Uppsala, Sweden);所有試劑均為分析純。

材料:金櫻根藥材由桂林三金股份有限公司周艷林博士提供并鑒定。

1.2 提取與分離

干燥的金櫻根8.5 kg,用60%的乙醇浸提2次,提取液濃縮得到浸膏,浸膏依次經過石油醚、乙酸乙酯、正丁醇萃取。將乙酸乙酯萃取部位(292 g)經硅膠(200~300目)柱色譜,分別用氯仿,氯仿∶甲醇(98∶2,95∶5,9∶1,8∶2,7∶3,5∶5),純甲醇洗脫。經TLC檢測合并得到7個流份。流分5(10.1 g)經反復Sephadex LH20柱色譜、MCI gel CHP 20P柱色譜以及半制備HPLC方法分離純化,得化合物1(27 mg)、2(18 mg)、3(167 mg)、4(46 mg)、 5(40 mg)、6(18 mg)、7(63mg)、8(30 mg)、9(16 mg)。

2結構鑒定

化合物1黃色無晶型粉末,分子式C15H14O6。 1HNMR (500 MHz, methanold4) δ: 2.51(1H, dd, J=8.1, 16.2 Hz, H4a), 2.85(1H, dd, J=5.3, 16.1 Hz, H4b), 3.98 (1H, m, H3), 4.57(1H, d, J=7.5,H2), 5.86 (1H, d, J=2.2 Hz, H6), 5.93 (1H, d, J=2.2 Hz, H8), 6.72 (1H, d, J=8.1 Hz, H5′), 6.77 (1H, dd, J=1.8, 8.1 Hz, H6′), 6.84 (1H, d, J=1.8 Hz, H2′); 13CNMR (125 MHz, methanold4) δ: 27.8 (C4), 66.1 (C3), 78.5 (C2), 94.5 (C6), 95.1 (C8), 98.7 (C1), 113.9 (C2′), 114.5 (C6′), 118.0 (C5′), 130.9 (C1′), 44.4 (C3′), 144.5 (C4′), 155.9 (C9), 156.3 (C7), 156.6 (C5)。上述波譜數據與關小麗等(2014)報道一致,故鑒定1為兒茶素。

化合物2黃色無晶型粉末,分子式C15H14O6。1HNMR (500 MHz, methanold4) δ: 2.74 ( 1H, dd, J=2.8, 16.8 Hz, H4ax), 2.86 (1H, dd, J=4.6, 16.7Hz, H4eq), 4.18 (1H, s, H3), 4.81 (1H, d, J=4.5Hz, H2), 5.94 (1H, d, J=2.0 Hz, H6), 6.04 (1H, d, J=2.0 Hz, H8), 6.77 (1H, d, J=8.2 Hz, H5′), 6.80 (1H, d, J=8.2 Hz, H6′), 6.98 (1H, d, J=1.6 Hz, H2′); 13CNMR(125 MHz, methanold4) δ: 27.8 (C4), 65.9 (C3), 78.0 (C2), 94.3 (C8), 94.7 (C6), 98.3 (C1), 114.0(C5′), 114.4 (C2′), 117.8 (C6′), 131.9 (C1′), 144.9(C3′), 145.0 (C4′), 155.8 (C5), 156.4 (C9), 156.6 (C7)。上述波譜數據與張朝鳳等(2003)報道一致,故鑒定2為表兒茶素。

化合物3白色針晶,分子式C36H58O10, ESIMS m/z: 649 [M H], 673 [M + Na]+。1HNMR (500 MHz, methanold4) δ: 0.79, 0.82, 1.03, 1.03, 1.22, 1.34(each 3H, s, CH3), 0.94(3H, d, J=6.6 Hz, CH3), 2.48 (1H, s, H18), 2.93 (1H, d, J=9.7 Hz, H3), 3.32~3.70 (m), 3.82 (1H, dd, J=2.0, 11.9 Hz, H2), 5.32 (1H, s, H12), 5.34 (1H, d, J=8.2, H1′); 13CNMR(125 MHz, methanold4), δ: 15.3 (q, C30), 15.8 (q, C26), 16.1 (q, C24), 16.3 (q, C25), 18.3 (t, C6),23.3 (t, C11),23.4 (q, C27),25.2 (t, C16), 25.7 (t, C21), 25.8 (t, C29), 28.0 (t, C15), 28.3 (q, C23), 32.7 (t, C7), 36.9 (t, C22), 37.8 (s, C4), 39.1 (s, C10), 39.9 (s, C8), 41.3 (s, C14), 41.5 (d, C20), 46.8 (t, C1), 47.2 (d, C9), 48.1 (t, C17), 53.6 (d, C18), 55.3 (d, C5), 61.1 (t, C6′), 68.2 (d, C2), 69.7 (d, C4′), 72.3 (s, C19), 72.5 (d, C2′), 76.9 (d, C6′), 77.1 (d, C3′), 83.2 (d, C3), 94.4(d,C1′), 128.1 (d, C12), 138.3 (s, C13), 177.1 (s, C28)。上述數據與吳小鵬等(2014)報道一致,故鑒定3為rosamltin。

化合物4白色晶體,分子式C36H58O11,ESIMS m/z: 665 [M- H], 689 [M + Na]+。 1HNMR (500 MHz, methanold4) δ: 0.74, 0.96, 0.97, 1.00, 1.25, 1.30 (each 3H, s, CH3), 4.05 (1H, d, J=11.2, H24b), 3.83 (1H, d, J=11.2, H24a), 5.27 (1H, s, H1′), 5.38 (1H, d, J=8.2, H12); 13CNMR (125MHz, methanold4), δ: 17.4 (q, C25) ,17.7 (q, C26), 20.0 (t, C6), 23.8 (q, C23), 25.0 (q, C27), 25.1 (t, C11), 25.2 (q, C30), 28.4 (t, C16), 28.6 (q, C29), 29.4 (t, C21), 29.5 (t, C15), 33.2 (t, C22), 34.1 (t, C7), 35.9 (s, C20), 39.2 (s, C10), 40.8 (s, C8), 42.6 (s, C14), 44.3 (s, C4), 45.0 (d, C18), 47.1 (s, C17), 47.7 (t, C1), 49.2 (d, C9), 57.2 (d, C5), 62.4 (t, C6′), 66.1 (t, C24), 69.6 (d,C2), 71.0 (d, C4′), 73.8 (d, C2′), 78.2 (d, C3′), 78.6 (d, C5′), 82.4 (d, C19), 85.9 (d, C3), 95.7 (d, C1′), 124.7 (d, C12), 144.3 (s, C13), 178.5 (s, C28)。以上波譜數據與李延芳等(2003)報道一致,故鑒定4為sericoside。

化合物5白色晶體,分子式C36H58O11, ESIMS m/z: 665 [M H], 689 [M + Na]+。 1HNMR (500 MHz, methanold4) δ: 0.79, 0.90, 1.03, 1.22, 1.36 (each 3H, s, CH3), 0.94 (3H, d, J=9.5 Hz), 2.55 (1H, s, H18), 5.27 (1H, s, H1′), 5.36 (1H, d, J=8.2, H12); 13CNMR (125 MHz, methanold4) δ: 16.6 (q, C30), 17.2 (q, C24), 17.3 (q, C26), 17.7 (q, C25), 19.0 (t, C6), 24.6 (q, C27), 24.7 (t, C11), 24.8 (t, C16), 26.4 (t, C21), 27.1 (t, C29), 29.5 (t, C15), 33.5 (t, C7), 38.1 (t, C22), 39.0 (s, C10), 41.2 (s, C8), 42.2 (d, C20), 42.4 (s, C14), 42.6 (s, C4), 42.8 (t, C1), 44.1 (d, C5), 48.2 (d, C9), 49.3 (t, C17), 55.8 (d, C18), 62.4 (t, C6′), 67.1 (d, C2), 71.0 (d, C4′), 71.2 (q, C23), 73.6 (s, C19), 73.7 (d, C2′), 78.1 (d, C5′), 78.3 (d, C3), 78.5 (d, C3′), 95.6 (d, C1′), 129.4 (d, C12), 139.5 (d, C13), 178.4 (s,C28)。以上數據與劉岱琳等(2010)報道基本一致,故鑒定5為2α,3α,19α,23tetrahydroxyurs12en28oic acid3OβDglucopyranosyl ester。

化合物6白色晶體,分子式C36H58O10, ESIMS m/z: 649 [M H], 673 [M + Na]+。 1HNMR (500 MHz, methanold4) δ: 0.79, 0.80, 1.04, 1.22, 1.30, 136 (each 3H, s, CH3), 0.94 (3H, d, J=6.6, CH3), 5.30 (1H, s, H12), 5.32 (1H, d, J=8.2Hz, H1′); 13CNMR (125 MHz, methanold4) δ: 13.0(q, C30) , 16.6(q, C25), 17.9(q, C26) ,19.5 (t, C6) , 22.4 (q, C24), 24.8 (t, C11) , 24.8 (q, C27) , 26.5 (t, C16) ,27.1 (q, C29), 27.2 (t, C21), 29.0 (q,C23) , 29.7 (t, C15) , 34.2 (t, C7), 38.3 (t,C22), 39.0 (s,C10), 39.4 (s,C4), 41.4 (s, C8), 42.0(t, C1), 42.6 (s, C14), 42.9 (d,C20), 48.2 (d, C9), 49.3 (d, C5), 49.5 (s, C17), 54.9 (d, C18), 62.5 (t, C6′), 67.2 (d, C2), 71.1(d, C4′), 73.6 (s, C19), 73.8 (d, C2′), 78.3 (d, C5′), 78.5 (d, C3′), 80.7 (d, C3), 95.8 (d, Cl′), 130.9 (d, C12), 138.4 (s, C13), 178.7 (s, C28)。以上數據與左國營等(2008)報道基本一致,故鑒定6為kajiichigoside F1。

化合物7白色晶體,分子式C36H56O11,ESIMS m/z: 663 [M H], 687 [M + Na]+。1HNMR (500MHz, methanold4) δ: 0.59, 0.80, 0.93, 1.22, 1.41(each 3H, s, CH3), 0.96(3H, d, J=7.6Hz), 2.18 (1H, d, J=12.0Hz, αH1), 2.37 (1H, d, J=12.0Hz, βH1), 2.55 (1H, s, H18), 2.64 (1H, t, H18), 3.68 (1H, dd, J=12.1, 4.5Hz, Ha6′), 3.81 (1H, dd, J=12.1, 2.0Hz, Hb6′), 4.40 (1H, s, H3), 5.31 (1H, s, H12), 5.33 (1H, d, J=8.2Hz, H1′); 13CNMR (125MHz, methanold4) δ: 13.5 (q, C24), 16.6 (q, C30), 17.2 (q, C26), 17.2 (q, C25), 19.5 (t, C6), 24.6 (q, C27), 24.7 (t, C11), 26.5 (t, C21), 27.1 (q, C29), 27.2 (t, C16), 29.7 (t, C15), 33.3 (t, C7), 38.2 (s, C10), 38.2 (t, C22), 41.6 (s, C8), 42.8 (d, C20), 42.8 (s, C14), 44.4 (s, C4), 47.2 (d, C9), 48.2 (d, C5), 49.5 (s, C17), 54.3 (t, C1), 54.9 (d, C18), 62.5 (t, C6′), 65.4 (t, C23), 71.1 (d, C4′), 73.6 (s, C19), 73.9 (d, C2′), 77.9 (d, C3′), 78.3 (d,C5′), 78.5 (d, C3), 95.8 (d, C1′), 129.0 (d, C12), 140.0 (s, C13), 178.5 (s, C28), 213.9 (s, C2)。以上數據與Germain et al(2009)報道基本一致,故鑒定7為 βDglucopyranosyl 3β,19αdihydroxy2oxours12en28oate。

化合物8白色晶體,分子式C35H60O6,在5%硫酸乙醇溶液中顯紫紅色,與胡蘿卜苷標準品TLC檢測Rf值一致,且混合后熔點不降低。13CNMR (125 MHz, CDCl3) δ: 12.1 (C18), 13.0 (C29), 17.0 (C26), 18.3 (C21), 19.0 (C27), 19.2 (C19), 19.8 (C11), 22.0 (C28), 22.1 (C15), 25.7(C10), 27.1 (C12), 29.0 (C25), 29.5 (C2), 30.4 (C8), 31.7 (C7), 34.4 (C22), 34.7 (C20), 37.1 (C23), 37.8 (C1), 40.6 (C4), 41.4 (C16), 42.1 (C13), 45.8 (C24), 48.2 (C9), 55.8 (C17), 56.0 (C14), 61.2 (C6′), 69.3 (C4′), 73.4 (C2′), 74.4 (C5′), 75.8 (C3′), 76.8 (C3), 104.0 (C1′), 122.1 (C6), 146.4 (C5)。以上數據與黃建猷等(2015)報道基本一致,故鑒定8為胡蘿卜苷。

化合物9白色針晶,分子式C29H50O,在5%硫酸乙醇溶液中顯紫紅色,與β谷甾醇標準品TLC檢測Rf值一致,且混合后熔點不降低。13CNMR (125 MHz, CDCl3) δ: 12.0 (C18), 12.1 (C29), 18.8 (C19), 19.1 (C26), 19.2 (C21), 19.8 (C27), 21.1 (C11), 23.1 (C28), 24.3 (C15), 26.1 (C23), 28.2 (C16), 29.1 (C27), 29.2 (C1), 29.3 (C25), 31.7 (C2), 31.9 (C8), 34.1 (C22), 36.4 (C10), 36.5 (C20), 38.3 (C12), 39.8 (C4), 42.3 (C11), 45.8 (C24), 50.1 (C9), 56.1 (C17), 56.8 (C14), 71.8 (C3), 121.7 (C6), 140.8 (C5)。以上數據與張洪財等(2016)報道基本一致,故鑒定9為β谷甾醇。

3結論

本研究從金櫻根乙醇浸膏的乙酸乙酯萃取部位分離得到9個化合物,其中化合物2、4、5、7為首次從該植物中分離得到,這些分離得到的化合物多為兒茶素類化合物和五環三萜類化合物,且多以同分異構體的形式存在。兒茶素類化合物大多具有抗氧化、抗菌等活性,三萜類化合物大多具有抗腫瘤、抗菌、抗病毒、抗炎等活性。因此我們將進一步對所分離的得到的化合物進行生物活性的研究,從而為該藥用植物的充分利用提供科學依據。

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