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      牡丹花化學(xué)成分研究

      2015-02-10 15:34:07閆慧嬌耿巖玲王岱杰劉建華
      天然產(chǎn)物研究與開發(fā) 2015年12期
      關(guān)鍵詞:牡丹花二氯甲烷芍藥

      閆慧嬌,趙 偉,耿巖玲,王岱杰,劉建華,王 曉*

      1山東省中藥質(zhì)量控制技術(shù)重點(diǎn)實(shí)驗(yàn)室(籌)山東省分析測試中心;2 山東師范大學(xué)生命科學(xué)學(xué)院,濟(jì)南 250014

      牡丹(Paeonia suffruticosaAndr.)屬毛茛科芍藥屬灌木,為中國特有名貴觀賞花卉和藥用植物。其根皮,又稱牡丹皮、丹皮,是一味應(yīng)用廣泛的傳統(tǒng)中藥,《神農(nóng)本草經(jīng)》列為中品,具有清熱涼血,活血化瘀之功效,現(xiàn)代研究證明其在臨床治療中可起到止痛,止痙攣,抗凝和抗氧化等作用[1-3]。牡丹花作為特色的天然生物資源和新資源食品,在我國有悠久的藥用和食用歷史,《四川中藥志》載:牡丹花性平、苦、淡,具有調(diào)經(jīng)活血的功能,主治月經(jīng)不調(diào),痛經(jīng)。前期研究證明,牡丹花花瓣富含黃酮類化合物[4,5],但系統(tǒng)的化學(xué)成分研究報(bào)道較少。為了進(jìn)一步利用牡丹花資源,我們對牡丹花的化學(xué)成分進(jìn)行了系統(tǒng)的分離,從中的到7 個(gè)單萜糖苷類化合物,分別為吡啶芍藥苷(1)、paeodanin B(2)、芍藥新苷(3)、乙酰芍藥苷(4)、芍藥苷(5)、苯甲酰芍藥苷(6)和氧化芍藥苷(7),及2 個(gè)酚酸類化合物,分別為沒食子酸(8)和沒食子酸甲酯(9)?;衔?~7 均首次從牡丹花中分離得到,這是第一次從牡丹花瓣中分離得到芍藥苷單萜糖苷類化合物。

      1 儀器與材料

      Varian INOVA-400 型核磁共振波譜儀(美國Varian 公司,以TMS 為內(nèi)標(biāo));Agilent5973 型質(zhì)譜儀(美國Agilent 公司);島津1200 分析型高效液相(日本島津公司);島津LC 6AD 制備型高效液相(日本島津公司,色譜柱為Shim-park RP-C18column,200 ×20 mm)。柱色譜用C18填料(日本YMC 公司);Sephadex LH-20(Amersham Biosciences 公司);柱色譜用硅膠(200~300 目)以及G254硅膠薄層板(青島海洋化工);乙醇(分析純,德州恒業(yè)化工有限公司);甲醇、二氯甲烷,分析純(天津市化學(xué)試劑廠);甲醇、乙腈(色譜純,山東禹王試劑有限公司)。

      牡丹花采自山東菏澤,經(jīng)鑒定為毛茛科芍藥屬植物牡丹(Paeonia suffruticosaAndr.)的花。

      2 提取與分離

      取干燥后的牡丹花瓣3.0 kg,粉碎后于70%乙醇中60 ℃溫浸三次,每次4 h,合并提取液,減壓濃縮至無醇味。浸膏分散于水中(1 L)成懸濁液,用乙酸乙酯萃取三次(3 × 1 L),得乙酸乙酯萃取物20 g。乙酸乙酯部分采用硅膠常壓柱,以二氯甲烷-甲醇(50∶1~2∶1)梯度洗脫,分段收集,其中二氯甲烷-甲醇(20∶1~10∶1)段經(jīng)TLC 檢測后分為A-C 三個(gè)組分。組分A(二氯甲烷-甲醇20∶1 段)經(jīng)常壓反相C-18 柱甲醇-水梯度洗脫(5%到70%甲醇)得5個(gè)組分(Fr.A1-A5)。Fr.A1(10%甲醇洗脫部位)經(jīng)過制備液相得到化合物9(5.0 mg),F(xiàn)r.A3(50%甲醇洗脫部位)經(jīng)過制備液相得到化合物3(7.0 mg)和4(6.0 mg),F(xiàn)r.A5(70%甲醇洗脫部位)經(jīng)過制備液相得到化合物6(32.0 mg)。組分B(二氯甲烷:甲醇15∶1 段)經(jīng)常壓反相C-18 柱甲醇-水梯度洗脫(5%到70%甲醇)分為5 個(gè)組分(Fr.B1-B5)。Fr.B2(30% 甲醇洗脫部位)經(jīng)過Sephadex LH-20(甲醇)得化合物5(60.0 mg),F(xiàn)r.B3(50%甲醇洗脫部位)經(jīng)過制備液相得化合物2(8.0 mg)。組分C(二氯甲烷∶甲醇10∶1 段)經(jīng)常壓反相C-18 柱甲醇-水梯度洗脫(5% 到70% 甲醇)得到3 個(gè)組分(Fr.C1-C3)。Fr.C1(10% 甲醇洗脫部位)經(jīng)過Sephadex LH-20(甲醇)得化合物8(21.0 mg),F(xiàn)r.C2 經(jīng)過Sephadex LH-20(甲醇),后經(jīng)制備液相得化合物1(4.0 mg)和化合物7(14.0 mg)。

      3 結(jié)構(gòu)鑒定

      化合物1 白色粉末(甲醇),ESI-MSm/z:482[M+H]+;1H NMR (DMSO,400MHz):δH2.05(1H,d,J=12.0 Hz,H-3a),1.65 (1H,d,J=12.0 Hz,H-3b),2.47 (1H,d,J=6.4 Hz,H-5),2.37(1H,dd,J=10.6,6.8 Hz,H-7a),1.82 (1H,d,J=10.6 Hz,H-7b),4.66 (2H,d,J=15.6 Hz,H-8),5.35 (1H,s,H-9),1.24 (3H,s,H-10),4.37 (1H,d,J=7.7 Hz,H-1'),2.97 (1H,m,H-2'),2.98(1H,m,H-4'),3.07 (2H,m,H-3',5'),3.65 (1H,m,H-6'a),3.35 (1H,m,H-6'b),9.12 (1H,d,J=1.5 Hz,H-2''),8.31 (1H,dt,J=7.9,1.8 Hz,H-4''),7.60 (1H,dd,J=7.9,4.8 Hz,H-5''),8.84(1H,dd,J=4.8,1.5 Hz,H-6'');13C NMR (DMSO,100MHz):δC88.0 (C-1),85.4 (C-2),44.0 (C-3),105.2 (C-4),42.7 (C-5),70.7 (C-6),22.4 (C-7),61.4 (C-8),100.4 (C-9),19.6 (C-10),99.1(C-1'),73.9 (C-2'),77.4 (C-3'),70.3 (C-4'),77.4 (C-5'),61.7 (C-6'),154.2 (C-2''),126.1(C-3''),137.4 (C-4''),124.4 (C-5''),150.6 (C-6''),165.1 (C-7'')。以上數(shù)據(jù)與文獻(xiàn)[6]報(bào)道對照基本一致,故鑒定化合物為吡啶芍藥苷。

      化合物2 白色粉末(甲醇),ESI-MSm/z:495[M+H]+;1H NMR (DMSO,400 MHz):δH2.89(1H,d,J=18.0 Hz,H-3a),2.34 (1H,d,J=18.0 Hz,H-3b),3.04 (1H,m,H-5),3.00 (1H,m,H-7a),2.10 (1H,d,J=10.6 Hz,H-7b),4.68 (2H,m,H-8),5.02 (1H,s,H-9),1.33 (3H,s,H-10),4.45 (1H,d,J=8.0 Hz,H-1'),3.66 (1H,d,J=11.0 Hz,H-6'a),3.08-3.46 (5H,m,H-2'-6'b),7.96(2H,d,J=7.5 Hz,H-2'',6''),7.55 (2H,t,J=7.5 Hz,H-3'',5''),7.68 (1H,t,J=7.0 Hz,H-4''),3.20 (3H,s,9-OMe);13C NMR (DMSO,100 MHz):δC87.2 (C-1),86.3 (C-2),48.9 (C-3),205.7 (C-4),47.0 (C-5),63.2(C-6),26.3 (C-7),63.2 (C-8),106.3 (C-9),20.6 (C-10),98.9 (C-1'),73.9(C-2'),77.5 (C-3'),70.7 (C-4'),77.3 (C-5'),61.7 (C-6'),130.1 (C-1''),129.7 (C-2'',6''),129.3 (C-3'',C-5''),133.9 (C-4''),166.2 (C-7'')。以上波譜數(shù)據(jù)與文獻(xiàn)[7]對照基本一致,故鑒定為paeodanin B。

      化合物3 白色粉末(甲醇),ESI-MSm/z:463[M+H]+;1H NMR (DMSO,400MHz):δH2.77(1H,m,H-3a),2.45 (1H,d,J=18.0 Hz,H-3b),2.78 (1H,m,H-5),2.38 (1H,t,J=13.0 Hz,H-7a),2.08 (1H,d,J=13.0,4.0 Hz,H-7b),4.71(2H,s,H-8),4.84 (1H,s,H-9),1.40 (3H,s,H-10),4.49 (1H,d,J=7.6 Hz,H-1'),3.14 (3H,s,H-3',4',5'),3.63 (1H,d,J=10.2 Hz,H-6'a),3.43 (1H,d,J=10.2 Hz,H-6'b),7.99 (2H,d,J=8.0 Hz,H-2'',6''),7.56 (2H,t,J=7.2 Hz,H-3'',5''),7.68 (1H,t,J=7.2 Hz,H-4'');13C NMR(DMSO,100 MHz):δC85.2 (C-1),102.8 (C-2),44.6 (C-3),217.1 (C-4),37.4 (C-5),55.4 (C-6),30.6 (C-7),62.7 (C-8),80.0 (C-9),16.5 (C-10),95.2 (C-1'),75.4 (C-2'),79.5 (C-3'),70.6(C-4'),73.2 (C-5'),61.2 (C-6'),129.7 (C-1''),129.7 (C-2'',6''),129.4 (C-3'',C-5''),134.1 (C-4''),166.0 (C-7'')。以上數(shù)據(jù)與文獻(xiàn)[8]報(bào)道對照基本一致,故鑒定化合物為芍藥新苷。

      化合物4 白色粉末(甲醇),ESI-MSm/z:523[M+H]+;1H NMR (DMSO,400MHz):δH1.95(1H,d,J=12.5 Hz,H-3a),1.67 (1H,d,J=12.5 Hz,H-3b),2.44 (1H,d,J=6.0 Hz,H-5),2.41(1H,m,H-7a),1.70 (1H,d,J=10.6 Hz,H-7b),4.63 (2H,d,J=12.0 Hz,H-8),5.34 (1H,s,H-9),1.20 (3H,s,H-10),4.42 (1H,d,J=7.4 Hz,H-1'),4.28 (1H,d,J=10.5 Hz,H-6'a),4.02 (1H,dd,J=10.5,7.5 Hz,H-6'b),2.95-3.18 (5H,m,H-2'-5'),7.99 (2H,d,J=7.5 Hz,H-2'',6''),7.56(2H,t,J=7.0 Hz,H-3'',5''),7.68 (1H,t,J=7.5 Hz,H-4''),2.01 (3H,s,H-COCH3);13C NMR (DMSO,100MHz):δC88.1 (C-1),85.2 (C-2),44.1 (C-3),105.1 (C-4),42.7 (C-5),70.7 (C-6),22.3(C-7),60.8 (C-8),100.5 (C-9),19.4 (C-10),99.0 (C-1'),74.0 (C-2'),77.0 (C-3'),70.3 (C-4'),73.8 (C-5'),64.0 (C-6'),130.1 (C-1''),129.7 (C-2'',6''),129.2 (C-3'',C-5''),133.9 (C-4''),166.2 (C-7''),170.6 (COCH3),21.1(COCH3)。以上數(shù)據(jù)與文獻(xiàn)[9]報(bào)道對照基本一致,故鑒定化合物為乙酰芍藥苷。

      化合物5 白色粉末(甲醇),ESI-MSm/z:481[M+H]+;1H NMR (DMSO,400MHz):δH2.05(1H,d,J=12.0 Hz,H-3a),1.66 (1H,d,J=12.0 Hz,H-3b),2.45 (1H,d,J=6.0 Hz,H-5),2.38(1H,dd,J=10.6,6.5 Hz,H-7a),1.82 (1H,d,J=10.6 Hz,H-7b),4.65 (2H,d,J=12.4 Hz,H-8),5.33 (1H,s,H-9),1.25 (3H,s,H-10),4.39 (1H,d,J=6.4 Hz,H-1'),3.66 (1H,m,H-6'a),3.18-3.45 (5H,m,H-2'-6'b),7.99 (2H,d,J=8.0 Hz,H-2'',6''),7.55 (2H,t,J=7.2 Hz,H-3'',5''),7.67 (1H,t,J=6.8 Hz,H-4'');13C NMR (DMSO,100 MHz):δC87.5 (C-1),85.0 (C-2),43.6 (C-3),104.8 (C-4),42.3 (C-5),70.3 (C-6),22.0 (C-7),60.5 (C-8),100.1 (C-9),19.1 (C-10),98.6(C-1'),74.5 (C-2'),76.9 (C-3'),70.0 (C-4'),76.9 (C-5'),61.2 (C-6'),129.7 (C-1''),129.3(C-2'',6''),128.8 (C-3'',C-5''),133.5 (C-4''),165.8 (C-7'')。以上數(shù)據(jù)與文獻(xiàn)[10]報(bào)道對照基本一致,故鑒定化合物為芍藥苷。

      化合物6 白色粉末(甲醇),ESI-MSm/z:585[M+H]+;1H NMR (DMSO,400 MHz):δH1.70(1H,d,J=12.5 Hz,H-3a),1.56 (1H,m,H-3b),2.39 (1H,m,H-5),2.39 (1H,m,H-7a),1.56 (1H,m,H-7b),4.62 (2H,d,J=9.0 Hz,H-8),5.31(1H,s,H-9),1.14 (3H,s,H-10),4.47 (1H,d,J=7.5 Hz,H-1'),3.50 (1H,t,J=8.0 Hz,H-6'a),3.00-3.25 (6H,m,H-2'-6'b),7.98 (4H,d,J=7.2 Hz,H-2'',6'',2''',6'''),7.56 (2H,d,J=8.0 Hz,H-3'',5''),7.51 (2H,d,J=8.0 Hz,H-3''',5'''),7.66 (2H,m,H-4'',4''');13C NMR (DMSO,100 MHz):δC88.1 (C-1),85.2 (C-2),43.9 (C-3),105.0 (C-4),42.6 (C-5),70.2 (C-6),22.0 (C-7),60.8 (C-8),100.4 (C-9),19.4 (C-10),99.0(C-1'),74.0 (C-2'),77.0 (C-3'),70.2 (C-4'),73.8 (C-5'),64.7 (C-6'),130.2 (C-1''),129.7(C-2'',6''),129.2 (C-3'',C-5''),133.9 (C-4''),166.2 (C-7''),130.1 (C-1'''),129.5 (C-2''',6'''),129.2 (C-3''',C-5'''),133.9 (C-4'''),165.9(C-7''')。以上數(shù)據(jù)與文獻(xiàn)[11]報(bào)道對照基本一致,故鑒定化合物為苯甲酰芍藥苷。

      化合物7 白色粉末(甲醇),ESI-MSm/z:497[M+H]+;1H NMR (DMSO,400 MHz):δH2.04(1H,d,J=12.0 Hz,H-3a),1.64 (1H,d,J=12.5 Hz,H-3b),2.42 (1H,d,J=4.0 Hz,H-5),2.35(1H,m,H-7a),1.80 (1H,d,J=10.4 Hz,H-7b),4.58 (2H,s,H-8),5.29 (1H,s,H-9),1.24 (3H,s,H-10),4.39 (1H,d,J=8.0 Hz,H-1'),3.66 (1H,d,J=11.5 Hz,H-6'a),2.95-3.17 (6H,m,H-2'-6'b),7.84 (2H,d,J=8.0 Hz,H-2'',6''),6.87 (2H,d,J=8.0 Hz,H-3'',5'');13C NMR (DMSO,100 MHz):δC87.9 (C-1),85.4 (C-2),44.1 (C-3),105.2 (C-4),42.8 (C-5),70.7 (C-6),22.5 (C-7),60.2 (C-8),100.6 (C-9),19.6 (C-10),99.1(C-1'),74.0 (C-2'),77.4 (C-3'),70.5 (C-4'),77.4 (C-5'),61.7 (C-6'),120.6 (C-1''),132.0(C-2'',6''),115.8 (C-3'',C-5''),162.7(C-4''),166.1(C-7'')。以上數(shù)據(jù)與文獻(xiàn)[12]報(bào)道對照基本一致,故鑒定化合物為氧化芍藥苷。

      化合物8 白色粉末(甲醇),ESI-MSm/z:171[M+H]+;1H NMR (DMSO,400 MHz):δH6.92(2H,s,H-2,6),9.31 (3H,brs,OH);13C NMR (DMSO,100 MHz):δC121.2 (C-1),109.2 (C-2),145.9(C-3),138.4 (C-4),145.9 (C-5),109.2 (C-6),168.1 (C-7)。以上數(shù)據(jù)與文獻(xiàn)[13]報(bào)道對照基本一致,故鑒定化合物為沒食子酸。

      化合物9 白色粉末(甲醇),ESI-MSm/z:185[M+H]+.1H NMR (DMSO,400 MHz):δH6.96(2H,s,H-2,6),3.76 (3H,s,Me),9.18 (3H,brs,OH);13C NMR (DMSO,100 MHz):δC119.8 (C-1),109.0 (C-2),146.1 (C-3),138.9 (C-4),146.1 (C-5),109.0 (C-6),166.8 (C-7)。以上數(shù)據(jù)與文獻(xiàn)[14]報(bào)道對照基本一致,故鑒定化合物為沒食子酸甲酯。

      4 結(jié)果與討論

      芍藥屬植物含有豐富的芍藥苷類單萜化合物。在傳統(tǒng)的牡丹產(chǎn)業(yè)中,大量的牡丹花被丟棄在田間地頭,造成巨大的資源浪費(fèi)。牡丹根皮是一味應(yīng)用廣泛的珍貴藥材,作為丹皮中的主要成分之一,芍藥苷類化合物在丹皮的藥理活性中發(fā)揮很大的作用。一直以來,牡丹花的研究都集中在黃酮類化合物的提取和分離上,我們的研究證明,牡丹花中除了含有黃酮類之外,同樣含有豐富的芍藥苷單萜糖苷類化合物,或?yàn)榻忉屇档せㄉ锘钚晕镔|(zhì)基礎(chǔ)及牡丹花資源開發(fā)和高值化利用提供參考。

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