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猴子癭袋化學(xué)成分研究

2019-09-10 07:22:44何小汝王雅琪徐柳云
世界中醫(yī)藥 2019年7期
關(guān)鍵詞:植物

何小汝 王雅琪 徐柳云

摘要 目的:研究波羅蜜屬植物猴子癭袋Artocarpus.Pithecogallus小枝的化學(xué)成分。方法:運用硅膠柱色譜、MCI gel樹脂、LH-20葡聚糖凝膠(Sephadex LH-20)柱色譜、HPLC、ODS等色譜分離手段,對猴子癭袋枝葉的95%乙醇提取物的乙酸乙酯部位進行分離純化,通過其1H-NMR和13C-NMR數(shù)據(jù)與文獻進行對照鑒定其結(jié)構(gòu)。結(jié)果:共分離了六個三萜類化合物,分別鑒定為3,25-二羥基羊毛脂烷-8,23(E)-二烯-7,11-二酮(1),(24R)-環(huán)阿屯烷-25-烯-3β,24-二醇(2),(24R)-環(huán)阿屯烷-24,25-二醇-3-酮(3),熊果酸(4),樺木酸(5),白樺脂醇(6)。結(jié)論:化合物1、5和6為首次從菠蘿蜜屬植物中分離獲得。

關(guān)鍵詞 波羅蜜;猴子癭袋;化學(xué)成分;分離;三萜;結(jié)構(gòu)鑒定;熊果酸;白樺脂醇

Abstract Objective:To study the chemical constituents of the twigs of Artocarpus.Pithecogallus.Methods:Compounds were isolated and purified by the normal phase silica gel,MCI gel,Sephadex LH-20,HPLC and ODS chromatography.Their structures were identified by comparing the 1H-NMR and 13C-NMR data with those reported in literature.Results:Six triterpenoids were isolated from the ethyl-acetate fraction in 95% ethanol extract of A.Pithecogallus.All isolates were identified as 3,25-dihydroxy lanolin-8,23(E)-diene-7,11-dione(1),(24R)-cycloalkane-25-ene-3,24-diol(2),(24R)-cycloalkane-24,25-diol-3-one(3),ursolic acid(4),birch acid(5)and betulin(6).Conclusion:Compounds 1,5 and 6 were isolated from the genus Artocarpus for the first time.

Key Words Artocarpus; A.pithecogallus; Chemical constituents; Isolation; Triterpenoid; Structure identification; Ursolic acid; Betulin

中圖分類號:R284.2 文獻標(biāo)識碼:A doi:10.3969/j.issn.1673-7202.2019.07.003

猴子癭袋Artocarpus.pithecogallus為桑科(Moraceae)波羅蜜屬常綠喬木植物,主要產(chǎn)自我國云南西雙版納地區(qū),生長于海拔1 400~1 630 m濕潤疏林中[1]。許多波羅蜜屬植物在東南亞、中國作為傳統(tǒng)民間用藥[2-3],如在我國西南地區(qū),白桂木A.hypargyreus Hance可用于治療風(fēng)濕、頭痛和黃疸[4]。化學(xué)研究表明,菠蘿蜜屬植物富含各種異戊烯基取代的酚性化合物,這些成分多具有細胞毒活性[5-8]、抗炎[9-13]、抗真菌[14]、抗氧化[15-16]及酪氨酸酶抑制活性[17-18],具有很好的研究開發(fā)潛力。為了從波羅蜜屬植物中發(fā)現(xiàn)新的活性有效成分,本課題組對該屬植物牛李A(yù).nigrifolius進行了系統(tǒng)的化學(xué)成分研究,從中發(fā)現(xiàn)了大量的三萜[19]及異戊烯基取代的黃酮和查爾酮[20],其中部分異戊烯基酚類化合物對人源宮頸癌HeLa細胞和胃癌SGC-7901細胞具有較強的細胞毒活性。為了進一步深入研究波羅蜜屬植物的化學(xué)成分,促進藥用資源的開發(fā)與利用,本課題采用多種色譜分離技術(shù)對猴子癭袋的乙酸乙酯萃取部位進行了系統(tǒng)研究,分離得到了六個化合物(圖1),經(jīng)鑒定分別為3,25-二羥基羊毛脂烷-8,23(E)-二烯-7,11-二酮(1),(24R)-環(huán)阿屯烷-25-烯-3β,24-二醇(2),(24R)-環(huán)阿屯烷-24,25-二醇-3-酮(3),熊果酸(4),樺木酸(5)和白樺脂醇(6)。

1 材料

Bruker AX-600型核磁共振波譜儀(瑞士布魯克公司),安捷倫1200型高效液相色譜儀(美國Agilent公司),Sephadex LH-20凝膠(美國GE Healthcare公司),MCI GEL CHP 20P(75~150 M)精細分離樹脂(日本Mitsubishi公司),反相硅膠ODS-A gel(12 nm,S-75 M)(日本YMC公司),YMC-Pack ODS半制備柱(10 mm×250 mm,5M,日本YMC公司),薄層硅膠板(煙臺江友硅膠開發(fā)有限公司),柱層析硅膠(青島海洋化工有限公司,100-200目,200-300目),色譜純甲醇和乙腈(百靈威公司),其他試劑均為市售分析純(西隴化工股份有限公司)。

本實驗藥材采自云南省勐臘縣,經(jīng)中科院西雙版納熱帶植物園許又凱教授鑒定為猴子癭袋A.pithecogallus,憑證標(biāo)本(AP201409)保存于南昌大學(xué)藥學(xué)院標(biāo)本館。

2 提取與分離

取晾干的猴子癭袋小枝5 kg,粉碎后于室溫下用95%乙醇反復(fù)提取3次,每次浸泡7 d,所得提取液減壓濃縮,得粗浸膏553.1 g。加入適量的水于粗浸膏中,并在超聲條件下攪拌混懸,用等體積的乙酸乙酯與懸浮液萃取4次,而后將有機相合并,濃縮得油狀浸膏246.0 g。將油狀浸膏通過MCI柱色譜分離,以甲醇/水(0∶ 100→100∶ 0,v/v)梯度洗脫,合并濃縮后得到6個組分(Fr.1~Fr.6)。組分Fr.3(19.8 g)經(jīng)ODS反相色譜(甲醇-水 35∶ 65→40∶ 60)和高效液相色譜(乙腈-水60∶ 40)洗脫得到單體化合物5(2.2 mg)和6(1.6 mg)。組分Fr.5(2.9 g)經(jīng)Sephadex LH-20柱色譜(甲醇),由ODS反相色譜(甲醇-水 70∶ 30→80∶ 20)和高效液相色譜(乙腈-水 95∶ 5)洗脫得到單體化合物1(5.0 mg)和4(1.3 mg)。組分Fr.6(10.9 g)經(jīng)ODS反相色譜(甲醇-水 80∶ 20→95∶ 5)和高效液相色譜(乙腈-水 35∶ 65)洗脫得到化合物2(7.0 mg)和3(14.0 mg)。

3 結(jié)構(gòu)鑒定

化合物1:白色固體;1H-NMR(400MHz,CDCl3):δH 3.30(1H,dd,J=10.4,6.0 Hz,H-3),5.58(2H,m,H-23,H-24),0.86(3H,d,J=6.4 Hz,H-21),0.90(3H,s,H-29),0.94(3H,s,H-18),1.02(3H,s,H-28),1.08(3H,s,H-30),1.30(3H,s,H-19),1.30(3H,s,H-26),1.30(3H,s,H-27);13C-NMR(100 MHz,CDCl3):δC 34.0(C-1),27.5(C-2),78.1(C-3),38.7(C-4),48.6(C-5),35.4(C-6),200.0(C-7),149.9(C-8),154.9(C-9),38.2(C-10),201.9(C-11),51.5(C-12),45.3(C-13),48.0(C-14),31.9(C-15),28.1(C-16),48.9(C-17),18.8(C-18),17.9(C-19),35.9(C-20),18.9(C-21),37.9(C-22),125.0(C-23),140.0(C-24),70.9(C-25),30.1(C-26),30.1(C-27),27.7(C-28),15.2(C-29),24.2(C-30)。以上數(shù)據(jù)與文獻報道基本一致[21],故鑒定該化合物為3β,25-二羥基羊毛脂烷-8,23(E)-二烯-7,11-二酮。

化合物2:白色固體;1H-NMR(400 MHz,CDCl3):δH 4.93(1H,s,H-26a),4.83(1H,s,H-26b),4.02(1H,t,J=6.0 Hz,H-24),3.28(1H,dd,J=10.8,4.0 Hz,H-3),0.33(1H,d,J=4.0 Hz,H-19),0.54(1H,d,J=4.0 Hz,H-19),1.72(3H,s,H-27),0.96(6H,s,H-18,H-29),0.88(3H,d,J=5.6 Hz,H-21),0.87(3H,s,H-28),0.80(3H,s,H-30)。13C-NMR(100 MHz,CDCl3):δC 32.1(C-1),30.5(C-2),79.0(C-3),40.6(C-4),47.2(C-5),21.3(C-6),28.3(C-7),48.1(C-8),20.1(C-9),26.2(C-10),26.2(C-11),33.0(C-12),45.4(C-13),49.0(C-14),35.7(C-15),26.6(C-16),52.3(C-17),18.2(C-18),30.0(C-19),36.1(C-20),18.5(C-21),32.0(C-22),31.8(C-23),76.5(C-24),147.9(C-25),111.1(C-26),17.7(C-27),19.5(C-28),25.6(C-29),14.1(C-30)。以上數(shù)據(jù)與文獻報道基本一致[22],故鑒定該化合物為(24R)-環(huán)阿屯烷-25-烯-3β,24-二醇。

化合物3:白色固體;1H-NMR(400 MHz,CDCl3):δH 3.29(1H,dd,J=10.0,1.6 Hz,H-24),0.78(1H,d,J=4.0 Hz,H-19a),0.57(1H,d,J=4.0 Hz,H-19b),1.22(3H,s,H-26),1.16(3H,s,H-27),1.09(3H,s,H-29),1.04(3H,s,H-18),0.99(3H,s,H-28),0.90(3H,s,H-30),0.89(3H,d,J=6.4 Hz,H-21);13C-NMR(100 MHz,CDCl3):δC 33.5(C-1),37.5(C-2),216.8(C-3),50.3(C-4),48.4(C-5),21.5(C-6),28.1(C-7),47.9(C-8),21.1(C-9),26.0(C-10),25.9(C-11),35.6(C-12),45.3(C-13),48.7(C-14),32.8(C-15),26.7(C-16),52.3(C-17),18.1(C-18),29.6(C-19),36.4(C-20),18.4(C-21),33.4(C-22),28.7(C-23),79.6(C-24),73.3(C-25),23.2(C-26),26.6(C-27),19.3(C-28),22.2(C-29),20.8(C-30)。以上數(shù)據(jù)與文獻報道基本一致[23],故鑒定該化合物為為(24R)-cycloartane-24,25-diol-3-one。

化合物4:熊果酸;白色固體;1H-NMR(400 MHz,CDCl3):δH 5.25(1H,t,J=3.2 Hz,H-12),3.22(1H,dd,J=10.8,4.4 Hz,H-3),1.08(3H,s,H-27),0.98(3H,s,H-23),0.94(3H,d,J=6.8 Hz,H-29),0.92(3H,s,H-26),0.86(3H,d,J=6.8 Hz,H-30),0.78(3H,s,H-24),0.77(3H,s,H-25);13C-NMR(100 MHz,CDCl3):δC 38.9(C-1),28.2(C-2),79.2(C-3),39.0(C-4),55.4(C-5),18.5(C-6),33.1(C-7),33.8(C-8),47.7(C-9),36.8(C-10),23.4(C-11),125.8(C-12),138.5(C-13),42.2(C-14),27.4(C-15),24.3(C-16),48.0(C-17),53.1(C-18),39.2(C-19),39.6(C-20),30.8(C-21),37.1(C-22),28.3(C-23),17.1(C-24),15.6(C-25),15.8(C-26),23.7(C-27),180.9(C-28),17.2(C-29),21.3(C-30)。以上數(shù)據(jù)與文獻報道基本一致[24],故鑒定該化合物為熊果酸。

化合物5:白色固體;1H-NMR(400 MHz,CD3OD):δH 4.64(1H,brs,H-29a),4.52(1H,s,H-29b),3.06(1H,dd,J=11.2,4.8 Hz,H-3),1.63(3H,s,H-30),0.94(3H,s,H-27),0.90(3H,s,H-23),0.88(3H,s,H-26),0.79(3H,s,H-25),0.68(3H,s,H-24);13C-NMR(150 MHz,CDCl3):δC 38.5(C-1),27.0(C-2),79.2(C-3),38.5(C-4),55.0(C-5),17.9(C-6),34.8(C-7),40.7(C-8),50.3(C-9),37.3(C-10),22.3(C-11),25.9(C-12),37.3(C-13),43.0(C-14),27.0(C-15),32.3(C-16),57.8(C-17),45.4(C-18),49.6(C-19),149.7(C-20),29.0(C-21),37.4(C-22),27.6(C-23),15.2(C-24),16.0(C-25),16.2(C-26),15.2(C-27),181.1(C-28),109.1(C-29),19.7(C-30)。以上數(shù)據(jù)與文獻報道基本一致[25],故鑒定該化合物為樺木酸。

化合物6:白色固體;1H-NMR(400 MHz,CDCl3):δH 4.67(1H,d,J=1.6 Hz,H-29a),4.57(1H,m,H-29b),3.78(1H,brd,J=10.8 Hz,H-28a),3.31(1H,brd,J=10.8 Hz,H-28b),3.17(1H,dd,J=11.2,5.2 Hz,H-3),2.38(1H,td,J=10.8,5.6 Hz,H-13),1.67(3H,s,H-30),1.01(3H,s,H-27),0.97(3H,s,H-26),0.96(3H,s,H-23),0.81(3H,s,H-24),0.75(3H,s,H-25);13C-NMR(150 MHz,CDCl3):δC 38.8(C-1),27.5(C-2),79.1(C-3),39.0(C-4),55.4(C-5),18.4(C-6),34.4(C-7),41.0(C-8),50.5(C-9),37.3(C-10),21.0(C-11),25.3(C-12),37.4(C-13),42.8(C-14),27.2(C-15),29.3(C-16),47.9(C-17),49.9(C-18),48.9(C-19),150.6(C-20),29.9(C-21),34.1(C-22),28.1(C-23),15.5(C-24),16.2(C-25),16.1(C-26),14.9(C-27),60.6(C-28),109.8(C-29),19.2(C-30)。以上數(shù)據(jù)與文獻報道基本一致[26],故鑒定該化合物為白樺脂醇。

本論文對波羅蜜屬植物猴子癭袋的小枝進行了系統(tǒng)的化學(xué)成分研究,從中分離得到六個三萜1-6,其中化合物1、5和6為首次從菠蘿蜜屬植物中分離獲得。

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(2019-06-05收稿 責(zé)任編輯:徐穎)

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