張艷+石玉生+胡文忠+宋麗艷+陳效忠
[摘要] 采用95%乙醇提取藥材,提取液回收至無(wú)醇味后依次過(guò)聚酰胺樹脂、MCI樹脂、中壓制備液相色譜和制備型高效液相色譜,從劍葉鳳尾蕨全草中分離得到8個(gè)二萜類化合物和2個(gè)倍半萜類化合物。質(zhì)譜(ESI-MS)數(shù)據(jù)和核磁共振(NMR)數(shù)據(jù)與文獻(xiàn)數(shù)據(jù)對(duì)比鑒定分離得到的化合物分別為ent-3β-hydroxy-kaur-16-en-19-al (1),4-epi-kaurenic acid (2),mitrekaurenone (3),7β,16α,17-trihydroxy-ent-kauran-19-oic acid (4),crotonkinin E (5),crotonkinin F (6),pterisolic acid A (7),pterisolic acid C (8),(2R)-pterosin P (9)和dehydropterosin B (10)?;衔?~6首次從鳳尾蕨屬中分離得到,化合物7~10首次從劍葉鳳尾蕨中獲得。細(xì)胞毒活性測(cè)試表明化合物5~8具有一定的抑制人結(jié)腸癌細(xì)胞HCT-116、 肝癌細(xì)胞HepG2和人胃癌細(xì)胞BGC-823的活性。
[關(guān)鍵詞] 劍葉鳳尾蕨;二萜;倍半萜;細(xì)胞毒活性
[Abstract] The materials were extracted by 95% ethanol,and the extracting solution was isolated by kinds of chromatographic columns including polyamide,MCI,preparative MPLC,and preparative HPLC. Eight diterpenes and two sesquiterpenes were isolated from the plant. On analysis of ESI-MS and NMR spectroscopic data,the structures were established as ent-3β-hydroxy-kaur-16-en-19-al (1),4-epi-kaurenic acid (2),mitrekaurenone (3),7β,16α,17-trihydroxy-ent-kauran-19-oic acid (4),crotonkinin E (5),crotonkinin F (6),pterisolic acid A (7),pterisolic acid C (8),(2R)-pterosin P (9),and dehydropterosin B (10). Compounds 1-6 were obtained from Pteris for the first time,and compounds 7-10 were obtained from P. ensiformis for the first time. Compounds 5-8 showed moderate activity against HCT-116,HepG2 and BGC-823 cell lines,separately.
[Key words] Pteris multifida;diterpenes; sesquiterpenes;cytotoxic activitiy
doi:10.4268/cjcmm20162420
鳳尾蕨科Pteridaceae植物在世界范圍內(nèi)有10個(gè)屬,400 余種,主要分布于熱帶和亞熱帶地區(qū)。鳳尾蕨屬Pteris為鳳尾蕨科的一個(gè)屬,在世界范圍內(nèi)有300余種,我國(guó)有66種,該屬植物在我國(guó)主要分布于西南和華南地區(qū)[1]。以往化學(xué)成分研究表明對(duì)映貝殼杉烷型二萜類和1-氫-茚-1-酮型倍半萜類化合物是鳳尾蕨屬植物的特征性成分。此外該屬植物還含有三萜類、黃酮類、脂肪酸等化學(xué)成分[1]。該屬植物生物活性廣泛,包括抗腫瘤、抗炎、抗菌[2],降血糖[3]等活性。值得關(guān)注的是從該屬植物半邊旗中分離得到的對(duì)映貝殼杉烷型二萜ent-11α-hydroxy-15-oxo-kaur-16-en-19-oic-acid(5F)具有抑制多種腫瘤細(xì)胞(如結(jié)腸癌細(xì)胞、胃癌細(xì)胞、甲狀腺腫瘤細(xì)胞、肝癌細(xì)胞、咽喉癌細(xì)胞)的作用[4],該發(fā)現(xiàn)引起國(guó)內(nèi)外學(xué)者的廣泛關(guān)注,5F是極具研究?jī)r(jià)值的熱點(diǎn)分子。藥用植物親緣學(xué)表明親緣關(guān)系近的植物含有結(jié)構(gòu)相似的化學(xué)成分,結(jié)構(gòu)相似的化學(xué)成分其生理活性多相似[5]。根據(jù)該原理從鳳尾蕨屬其他種類植物中尋找具有更強(qiáng)抗腫瘤活性的對(duì)映貝殼杉烷型二萜能起到事半功倍的效果。
劍葉鳳尾蕨P. ensiformis Burm.為鳳尾蕨科鳳尾蕨屬藥用植物,分布于我國(guó)華南、西南、華東、臺(tái)灣等地。全草入藥,鮮用或干用均可。具有清熱利濕、消腫解毒、涼血止血的功效?,F(xiàn)代藥理研究表明劍葉鳳尾蕨提取物對(duì)多種腫瘤細(xì)胞具有抑制作用[6-8],然而其抗腫瘤的藥效物質(zhì)一直沒(méi)有明確。本文對(duì)劍葉鳳尾蕨化學(xué)成分和生物活性進(jìn)行系統(tǒng)研究,從該植物中分離并鑒定了8個(gè)二萜類化合物、2個(gè)倍半萜類化合物,并對(duì)分離得到的化合物進(jìn)行了細(xì)胞毒活性測(cè)試。
1 材料
Bruker Avance DRX-400型核磁共振波譜儀 (布魯克公司,瑞士),TMS為內(nèi)標(biāo);Agilent 1100 LC/MSD Trap-SL質(zhì)譜儀(安捷倫公司,美國(guó));Shimadazu LC-6A (SPD-10A) 制備型HPLC,同時(shí)配備RID-10A示差折光檢測(cè)器(島津公司,日本),Waters XBridge C18 (4.6 mm×250 mm,5 μm) 色譜柱 (沃特世公司,美國(guó));中壓制備液相色譜 (拜泰齊公司,瑞典),ODS色譜柱(50 mm×500 mm,50 μm,YMC公司,日本);旋光值在utopol Ⅱ型旋光儀(魯?shù)婪蚬?,美?guó))測(cè)定。
藥材于2014年7月采集于廣東省中山市五桂山,經(jīng)黑龍江中醫(yī)藥大學(xué)佳木斯學(xué)院陳效忠副教授鑒定為劍葉鳳尾蕨P. ensiformis全草。藥材標(biāo)本保存于黑龍江中醫(yī)藥大學(xué)佳木斯學(xué)院標(biāo)本館(標(biāo)本號(hào)ID-g-20140726)。
2 方法
2.1 提取與分離 95%乙醇提取藥材(10 kg) 3次,每次1 h,減壓回收提取液至無(wú)醇味。提取液過(guò)聚酰胺柱色譜,依次用水,30%,50%,95%乙醇溶液洗脫,獲得4個(gè)洗脫部位Fr.(A~D)。Fr.B (100 g) 過(guò)MCI 柱色譜,依次用水,30%,50%,95%乙醇溶液洗脫,獲得4個(gè)部位 Fr. (B1~B4)。Fr.B-4 (20 g) 過(guò)MPLC色譜(甲醇洗脫,10%~100%)獲得23個(gè)流分。Fr.B-4b(200.5 mg)過(guò)制備型HPLC (20%甲醇為流動(dòng)相)獲得化合物 9 (12.0 mg)和10 (10.0 mg)。Fr.B-4e(300.8 mg)過(guò)制備型HPLC (20%甲醇為流動(dòng)相)獲得化合物 1 (8.0 mg) 和3 (10.0 mg)。Fr.B-4f(200.8 mg)過(guò)制備型HPLC (30%甲醇為流動(dòng)相)獲得化合物 4 (12.0 mg) 和 6 (11.0 mg)。Fr.B-4g(800.8 mg)過(guò)制備型HPLC (35%甲醇為流動(dòng)相)獲得化合物 2 (15.0 mg),5 (10.0 mg),7 (15.0 mg)。Fr.B-4h(260.5 mg)過(guò)制備型HPLC (40%甲醇為流動(dòng)相)獲得化合物 8 (20.0 mg)。
2.2 MTT法測(cè)試細(xì)胞毒活性 3種人源腫瘤細(xì)胞(結(jié)腸癌細(xì)胞HCT-116、人肝癌細(xì)胞HepG2和人胃癌細(xì)胞BGC-823)用于化合物細(xì)胞毒活性測(cè)試。
方法如下:腫瘤細(xì)胞加入96孔細(xì)胞培養(yǎng)板,調(diào)整細(xì)胞懸液濃度達(dá)到1×104個(gè)/mL,在37 ℃,5%CO2的飽和水汽二氧化碳培養(yǎng)箱中培養(yǎng)3 h。每孔中加入不同濃度的待測(cè)樣品(樣品濃度依次為0.32,1.6,8.0,40.0,200.0 μmol·L-1),繼續(xù)培養(yǎng)96 h。取出每孔內(nèi)溶液,離心,吸去培養(yǎng)液,用PBS洗滌1次。每孔加0.1 mL PBS和10 μL MTT染液,繼續(xù)培養(yǎng)3 h,然后每孔加入100 μL Formanzan溶解液。用酶標(biāo)儀測(cè)定500 nm處的吸收度,最后用Reed-Muench法計(jì)算IC50。
3 化合物結(jié)構(gòu)鑒定
化合物1 白色不定型粉末。根據(jù)ESI-MS m/z 303 [M+H]+,分子式為C20H30O2。1H-NMR (CDCl3,400 MHz) δ: 1.95 (1H,m H-1a),0.96 (1H,m,H-1b),1.90 (1H,m H-2a),1.88 (1H,m,H-2b),3.19 (1H,m,H-3),1.06 (1H,dd,J=13.0,3.0 Hz,H-5),1.90 (1H,m H-6a),1.60 (1H,m,H-6b),1.63 (1H,m H-7a),1.53 (1H,m,H-7b),1.06 (1H,m,H-9),1.67 (1H,m,H-11a),1.56 (1H,m,H-11b),1.95 (1H,m,H-12a),1.18 (1H,m,H-12b),2.68 (1H,m,H-13),1.60 (1H,m,H-14a),1.50 (1H,m,H-14b),2.10 (1H,m,H-15a),2.07 (1H,m,H-15b),4.83 (1H,m,H-17a),4.77 (1H,m,H-17b),1.29 (3H,s,H-18),9.78 (3H,s,H-19),0.95 (3H,s,H-20);13C-NMR (CDCl3,100 MHz) δ: 38.7 (C-1),28.5 (C-2),77.3 (C-3),52.2 (C-4),56.1 (C-5),20.5 (C-6),41.5 (C-7),43.6 (C-8),54.3 (C-9),39.2 (C-10),18.6 (C-11),39.9 (C-12),43.9 (C-13),32.8 (C-14),48.9 (C-15),155.3 (C-16),103.7 (C-17),19.6 (C-18),208.2 (C-19),16.7 (C-20)。 以上數(shù)據(jù)與文獻(xiàn)[9]對(duì)比,故鑒定化合物為ent-3β-hydroxy-kaur-16-en-19-al。
化合物2 無(wú)色油狀物。ESI-MS m/z 303 [M+H]+,分子式為C20H30O3。1H-NMR (CDCl3,400 MHz) δ: 1.86 (1H,m,H-1a),0.89 (1H,m,H-1b),1.60 (1H,m,H-2a),1.50 (1H,m,H-2b),1.98 (1H,m,H-3a),1.11 (1H,m,H-3b),1.69 (1H,m,H-5),1.20 (2H,m,H-6),1.68 (1H,m,H-7a),1.52 (1H,m,H-7b),1.20 (1H,m,H-9),1.60 (2H,m,H-11),1.63 (1H,m,H-12a),1.48 (1H,m,H-12b),2.68 (1H,m,H-13),1.79 (1H,m,H-14a),1.63 (1H,m,H-14b),2.10 (1H,d,J=16.0 Hz,H-15a),2.09 (1H,d,J=16.0 Hz,H-15b),4.83 (1H,s,H-17a),4.75 (1H,s,H-17b),1.18 (3H,s,H-18),1.09 (3H,s,H-20);13C-NMR (CDCl3,100 MHz) δ: 39.8 (C-1),18.2 (C-2),39.9 (C-3),47.7 (C-4),50.2 (C-5),23.3 (C-6),33.3 (C-7),44.0 (C-8),56.2 (C-9),38.8 (C-10),40.7 (C-11),17.8 (C-12),44.5 (C-13),37.0 (C-14),49.1 (C-15),155.9 (C-16),103.2 (C-17),16.2 (C-18),185.5 (C-19),17.9 (C-20)。 以上數(shù)據(jù)與文獻(xiàn)[10]對(duì)比,故鑒定化合物為4-epi-kaurenic acid。
化合物3 無(wú)色油狀物。ESI-MS m/z 315 [M+H]+,分子式為C20H26O3。1H-NMR (CDCl3,400 MHz) δ: 1.59 (1H,m,H-1a),1.05 (1H,m,H-1b),1.57 (2H,m,H-2),2.23 (1H,m,H-3a),1.46 (1H,m,H-3b),2.27 (1H,d,J=5.0 Hz,H-5),4.89 (1H,d,J=5.0 Hz,H-6),1.67 (1H,m,H-9),2.13 (1H,m,H-11a),1.42 (1H,m,H-11b),1.43 (1H,m,H-12a),1.26 (1H,m,H-12b),2.72 (2H,m,H-13),1.90 (1H,dd,J=13.0,6.0 Hz,H-14a),1.65 (1H,dd,J=13.0,4.0 Hz,H-14b),2.37 (1H,d,J=16.0 Hz,H-15a),2.28 (1H,d,J=16.0 Hz,H-15b),5.08 (1H,s,H-17a),4.93 (1H,s,H-17b),1.33 (3H,s,H-18),0.72 (3H,s,H-20);13C-NMR (CDCl3,100 MHz) δ: 34.6 (C-1),18.3 (C-2),29.2 (C-3),41.8 (C-4),52.9 (C-5),76.8 (C-6),209.3 (C-7),54.0 (C-8),57.5 (C-9),35.6 (C-10),32.0 (C-11),17.2 (C-12),37.6 (C-13),32.3 (C-14),48.4 (C-15),157.0 (C-16),108.5 (C-17),26.8 (C-18),180.2 (C-19),15.9 (C-20)。 以上數(shù)據(jù)與文獻(xiàn)[10]對(duì)比,故鑒定化合物為mitrekaurenone。
化合物4 無(wú)色油狀物。ESI-MS m/z 353 [M+H]+,分子式為C20H32O5。1H-NMR (CDCl3,400 MHz) δ: 1.78 (1H,m H-1a),0.86 (1H,m,H-1b),1.93 (1H,m H-2a),1.41 (1H,m,H-2b),2.08 (1H,d,m,H-3a),1.02 (1H,m,H-3b),1.70 (1H,m,H-5),2.06 (1H,m H-6a),1.90 (1H,m,H-6b),3.56 (1H,br s,H-7),1.37 (1H,m,H-9),1.58 (1H,m,H-11a),1.54 (1H,m,H-11b),1.60 (1H,m,H-12a),1.55 (1H,m,H-12b),2.01 (1H,m,H-13),1.80 (1H,d,J=12.0 Hz,H-14a),1.67 (1H,J=13.0,4.0 Hz,H-14b),1.65 (1H,d,J=14.0 Hz,H-15a),1.52 (1H,d,J=14.0 Hz,H-15b),3.65 (1H,d,J=12.0 Hz,H-17a),3.60 (1H,d,J=12.0 Hz,H-17b),1.09 (3H,s,H-18),0.91 (3H,s,H-20);13C-NMR (CDCl3,100 MHz) δ: 40.0 (C-1),20.1 (C-2),38.6 (C-3),44.1 (C-4),47.5 (C-5),30.0 (C-6),77.6 (C-7),48.7 (C-8),50.7 (C-9),39.8 (C-10),18.6 (C-11),27.0 (C-12),45.6 (C-13),36.1 (C-14),49.3 (C-15),81.8 (C-16),66.0 (C-17),29.1 (C-18),181.7 (C-19),15.8 (C-20)。以上數(shù)據(jù)與文獻(xiàn)[11]對(duì)比,故鑒定化合物為7β,16α,17-trihydroxy-ent-kauran-19-oic acid。
化合物5 白色無(wú)定型粉末。ESI-MS m/z 403 [M+H]+,分子式為C24H34O5。1H-NMR (CDCl3,400 MHz) δ: 1.93 (1H,m,H-1a),0.87 (1H,m,H-1b),1.64 (2H,m,H-2),1.36 (3H,m,H-3),1.37 (1H,m,H-5),1.64 (1H,m,H-6a),1.11 (1H,m,H-6b),1.93 (1H,m,H-7a),1.36 (1H,m,H-7b),1.47 (1H,m,H-9),5.13 (1H,m,H-11),2.43 (1H,m,H-12a),1.47 (1H,m,H-12b),3.08 (1H,m,H-13),1.95 (2H,m,H-14),5.90 (1H,s,H-17a),5.25 (1H,s,H-17b),3.89 (1H,d,J=12.0 Hz,H-18a),3.66 (1H,d, J=12.0 Hz,H-18b),0.80 (3H,s,H-19),1.10 (3H,s,H-20),1.87 (3H,s,H-22),2.10 (3H,s,H-24);13C-NMR (CDCl3,100 MHz) δ: 39.0 (C-1),18.3 (C-2),35.4 (C-3),36.6 (C-4),48.8 (C-5),17.9 (C-6),33.3 (C-7),50.7 (C-8),59.8 (C-9),38.9 (C-10),68.3 (C-11),36.5 (C-12),36.8 (C-13),38.8 (C-14),209.2 (C-15),150.1 (C-16),113.4 (C-17),72.6 (C-18),17.9 (C-19),18.7 (C-20),170.1 (C-21),21.6 (C-22),171.7 (C-23),21.3 (C-24)。以上數(shù)據(jù)與文獻(xiàn)[12]對(duì)比,故鑒定化合物為crotonkinin E。
化合物6 白色無(wú)定型粉末。ESI-MS m/z 403 [M+H]+,分子式為C24H34O5。1H-NMR (CDCl3,400 MHz) δ: 1.83 (1H,m,H-1a),0.79 (1H,m,H-1b),1.68 (2H,m,H-2),1.46 (1H,m,H-3a),1.35 (1H,m,H-3b),1.43 (1H,m,H-5),1.86 (1H,m,H-6a),1.43 (1H,m,H-6b),5.17 (1H,dd,J=10.0,4.5 Hz,H-7),1.33 (1H,m,H-9),1.67 (1H,m,H-11a),1.54 (1H,m,H-11b),2.00 (1H,m,H-12a),1.78 (1H,m,H-12b),3.13 (1H,m,H-13),2.18 (1H,m,H-14a),2.09 (1H,m,H-14b),6.01 (1H,s,H-17a),5.30 (1H,s,H-17b),3.90 (1H,d,J=11.0 Hz,H-18a),3.60 (1H,d,J=11.0 Hz,H-18b),0.83 (3H,s,H-19),1.17 (3H,s,H-20),1.90 (3H,s,H-22),2.17 (3H,s,H-24);13C-NMR (CDCl3,100 MHz) δ: 39.1 (C-1),18.2 (C-2),35.9 (C-3),36.7 (C-4),45.9 (C-5),24.8 (C-6),73.5 (C-7),56.7 (C-8),52.3 (C-9),39.8 (C-10),17.8 (C-11),32.6 (C-12),37.6 (C-13),29.8 (C-14),207.9 (C-15),148.9 (C-16),115.6 (C-17),72.3 (C-18),17.9 (C-19),18.5 (C-20),169.7 (C-21),21.4 (C-22),171.6 (C-23),21.5 (C-24)。以上數(shù)據(jù)與文獻(xiàn)[12]對(duì)比,故鑒定化合物為crotonkinin F。
化合物7 白色無(wú)定型粉末。ESI-MS m/z 347 [M+H]+,分子式為C20H26O5。1H-NMR (CDCl3,400 MHz) δ: 1.87 (1H,m,H-1a),1.09 (1H,m,H-1b),1.76 (1H,m,H-2a),1.34 (1H,m,H-2b),2.08 (1H,m,H-3a),0.87 (1H,m,H-3b),1.26 (1H,d, J=6.0 Hz,H-5),5.10 (1H,m,H-6),2.32 (1H,dd,J=16.0,6.8 Hz,H-7a),1.67 (1H,brd,J=16.0 Hz,H-7b),5.66 (1H,dd,J=4.0 Hz, J=3.0 Hz,H-11),2.50 (1H,dd,J=18.0,3.0 Hz,H-12a),2.29 (1H,m,H-12b),1.79 (1H,d,J=11.0,4.0 Hz,H-14a),1.78 (1H,dd,J=11.0,1.0 Hz,H-14b),6.06 (1H,brs,H-17a),5.67 (1H,brs,H-17b),1.27 (3H,s,H-18),1.00 (3H,s,H-20);13C-NMR (CDCl3,100 MHz) δ: 41.5 (C-1),20.3 (C-2),38.8 (C-3),45.0 (C-4),56.3 (C-5),65.1 (C-6),34.2 (C-7),53.1 (C-8),148.2 (C-9),40.0 (C-10),122.5 (C-11),43.3 (C-12),74.6 (C-13),47.2 (C-14),203.5 (C-15),153.0 (C-16),118.1 (C-17),30.0 (C-18),180.3 (C-19),25.5 (C-20)。以上數(shù)據(jù)與文獻(xiàn)[13]對(duì)比,故鑒定化合物為pterisolic acid A。
化合物8 白色無(wú)定型粉末。ESI-MS m/z 331 [M+H]+,分子式為C20H26O4。1H-NMR (CDCl3,400 MHz) δ: 1.79 (1H,brd,J=14.0 Hz,H-1a),1.09 (1H,m,H-1b),1.86 (1H,m,H-2a),1.37 (1H,m,H-2b),2.05 (1H,m,H-3a),0.93 (1H,m,H-3b),1.68 (1H,dd, J=11.0,7.0 Hz,H-5),2.16 (1H,m,H-6),1.87 (1H,m,H-7a),1.77 (1H,m,H-7b),5.58 (1H,dd,J=5.0,3.0 Hz,H-11),2.59 (1H,dd,J=16.0,3.0 Hz,H-12a),2.20 (1H,m,H-12b),1.79 (1H,d,J=12.0 Hz,H-14a),1.59 (1H,d,J=12.0 Hz,H-14b),5.87 (1H,brs,H-17a),5.58 (1H,brs,H-17b),1.19 (3H,s,H-18),1.07 (3H,s,H-20); 13C-NMR (CDCl3,100 MHz) δ: 42.0 (C-1),20.8 (C-2),38.5 (C-3),44.9 (C-4),48.0 (C-5),18.6 (C-6),26.0 (C-7),53.0 (C-8),150.0 (C-9),40.3 (C-10),123.5 (C-11),43.6 (C-12),74.2 (C-13),49.0 (C-14),202.9 (C-15),154.8 (C-16),116.7 (C-17),28.5 (C-18),180.3 (C-19),22.7 (C-20)。以上數(shù)據(jù)與文獻(xiàn)[13]對(duì)比,故鑒定化合物為pterisolic acid C。
化合物9 白色無(wú)定型粉末。[α]25D -20.0 (c 0.15,CH3OH);ESI-MS m/z 235 [M+H]+,分子式為C14H18O3。1H-NMR (CDCl3,400 MHz) δ: 2.70 (1H,m,H-2),3.32 (1H,m,H-3a),2.65 (1H,m,H-3b),7.30 (1H,s,H-4),1.31 (1H,d,J=5.0 Hz,H-11),4.75 (1H,s,H-12),3.10 (2H,t,J=7.0 Hz,H-13),3.92 (2H,t,J=7.0 Hz,H-14),2.63 (1H,s,H-15);13C-NMR (CDCl3,100 MHz) δ: 210.9 (C-1),42.3 (C-2),34.2 (C-3a),125.5 (C-4),146.7 (C-5),135.5 (C-6),138.3 (C-7),134.0 (C-8),153.3 (C-9),16.3 (C-11),59.9 (C-12),30.3 (C-13),61.2 (C-14),13.7 (C-15)。以上數(shù)據(jù)與文獻(xiàn)[14]基本一致,故鑒定化合物為(2R)-pterosin P。
化合物10 白色無(wú)定型粉末。ESI-MS m/z 217 [M+H]+,分子式為C14H16O2。1H-NMR (CDCl3,400 MHz) δ: 6.68 (1H,s,H-3a),7.03 (1H,s,H-4),1.89 (1H,s,H-11),2.35 (1H,s,H-12),2.98 (2H,t,J=7.0 Hz,H-13),3.79 (2H,t,J=7.0 Hz,H-14),2.58 (1H,s,H-15);13C-NMR (CDCl3,100 MHz) δ: 200.8 (C-1),126.3 (C-2),141.9 (C-3a),122.3 (C-4),142.9 (C-5),136.7(C-6),138.0 (C-7),135.8 (C-8),144.3 (C-9),10.9 (C-11),21.3 (C-12),32.5 (C-13),62.1 (C-14),13.8(C-15)。以上數(shù)據(jù)與文獻(xiàn)[15]對(duì)比,故鑒定化合物為dehydropterosin B。
4 結(jié)果與討論
本文對(duì)劍葉鳳尾蕨化學(xué)成分和細(xì)胞毒活性做了系統(tǒng)的研究。從該植物中分離并鑒定了10個(gè)化合物,其中化合物1~6為首次從鳳尾蕨屬中分離獲得,化合物7~10為首次從劍葉鳳尾蕨中分離得到。細(xì)胞毒活性測(cè)試表明化合物5~8具有中等強(qiáng)度抑制人結(jié)腸癌細(xì)胞HCT-116,肝癌細(xì)胞HepG2,人胃癌細(xì)胞BGC-823活性,IC50見表1。本文的研究對(duì)劍葉鳳尾蕨的開發(fā)利用奠定了理論基礎(chǔ)。
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[責(zé)任編輯 丁廣治]