摘要
采用大孔吸附树脂、正、反相硅胶、Sephadex LH-20等多种柱色谱方法和制备高效液相色谱法对鸡血藤属植物丰城鸡血藤Callerya nitita Benth.var.hirsutissima.Z.Wei.藤茎70%乙醇提取物的石油醚和正丁醇萃取部位化学成分进行分离,并根据化合物的理化性质、波谱数据对化合物的结构进行鉴定。从两个萃取部位共分离鉴定了1个三萜类化合物和20个黄酮类化合物,即蒲公英赛酮(1)、槐角苷(2)、saikoisoflavonoside A(3)、鹰嘴豆芽素A 7-O-β-D-呋喃芹菜糖基-(1→5)-β-D-呋喃芹菜糖基(1→6)-β-D-吡喃葡萄糖苷(4)、刺芒柄花素-7-O-β-D-吡喃半乳糖苷(5)、3′-O-甲基红车轴草素(6)、鹰嘴豆芽素A 7-O-β-D-呋喃芹菜糖基-(1→2)-β-D-吡喃葡萄糖苷(7)、槐属双苷(8)、黄甘草苷(9)、4′-羟基-3′-甲氧基异黄酮-7-O-β-D-呋喃芹菜糖基-(1→6)-β-D-吡喃葡萄糖苷(10)、樱黄素(11)、樱黄素4′-O-β-D-吡喃葡萄糖苷(12)、红车轴草素-7-O-β-D-吡喃葡萄糖苷(13)、8-甲氧基异刺芒柄花素(14)、染料木素(15)、红车轴草素(16)、鹰嘴豆芽素A(17)、5,7-二羟基-3′,5′-二甲氧基异黄酮(18)、芒柄花苷(19)、异芒柄花素(20)、木犀草素(21)。其中化合物1 ~ 10、12 ~ 14、16 ~ 18、20为该植物中首次分离得到。
Chemical constituents from the stem of Callerya nitida Benth. var. hirsutissima Z. Wei.
丰城鸡血藤(Calleryanitida Benth.var.hirsutissima Z.Wei.)在《中国植物志》(第四十卷,1994年)记载为丰城崖豆藤Millettianitida Benth.var.hirsutissima Z.Wei.收载在部颁标准成方十册(1995)[1]及江西省(1996、2014)和湖南省(2009)中药材标准[2-3],功能为活血、补血和通络,临床主要用于肢体麻木、瘫痪、腰膝酸痛、月经不调和贫血。丰城鸡血藤的化学成分已分离鉴定出约70个化合物[4-5],主要为黄酮类成分,三萜类次之,其他尚含木质素和酚酸类等。本课题组前期从丰城鸡血藤70%乙醇的石油醚与正丁醇萃取部位分得1个木脂素类、2个三萜类和12个黄酮类共计15个化合物[6],本研究继之从石油醚部位分离鉴定得到1个三萜类化合物,从正丁醇部位分离鉴定得到20个黄酮类化合物,其中17个化合物为首次从该植物中分离得到。本研究为鸡血藤属丰城鸡血藤的合理开发利用奠定了基础。
Avance IIITM 600 MHz型核磁共振波谱仪(瑞士Bruker公司);AB Sciex TripleTOF® 5600型质谱仪(美国AB Sciex公司);Agilent 1200高效液相色谱仪(美国Agilent公司);Welch Xtimate C18色谱柱(4.6 mm × 250 mm,5 μm,上海月旭公司);YMCPack ODS-AC18制备柱(20 mm×250 mm,5 μm,日本YMC公司)。
四甲基硅烷(TMS)、氘代二甲亚砜(DMSO-d6)、氘代氯仿(CDCl3)(Cambridge Isotope Laboratories inc剑桥同位素实验室);葡聚糖凝胶Sephadex LH-20(美国GE公司);薄层色谱硅胶G、GF254和柱色谱用硅胶(100 ~ 200目,200 ~ 300目,300 ~ 400目,青岛海洋化工);D101大孔吸附树脂(沧州宝恩吸附材料科技有限公司),分析和制备高效液相色谱所用试剂为色谱纯(美国Fisher公司);其他试剂均为市售分析纯。
丰城鸡血藤药材购自江西华南医药有限公司,由该公司中药师熊国保鉴定为豆科鸡血藤属植物丰城鸡血藤Callerya nitida var.hirsutissima Z.Wei.的干燥藤茎,标本存放于江西中医药大学中药资源标本馆。
丰城鸡血藤干燥藤茎20 kg,用10倍质量70%乙醇加热回流,提取3次,每次1 h,合并,减压浓缩,得浸膏2 230.15 g,加水混悬,依次釆用石油醚、三氯甲烷、乙酸乙酯、正丁醇萃取,各萃取5次,得到各部位的萃取物,其中石油醚部位浸膏40.3 g,正丁醇部位浸膏180.4 g。
石油醚部位经硅胶柱色谱(200~300目)以石油醚-乙酸乙酯(120∶1 ~ 0∶1)梯度洗脱,经TLC检识,合并,得到Fr.1~Fr.23;Fr17经硅胶柱色谱(300~400目)以石油醚-乙酸乙酯(20∶1)等度洗脱,得到化合物1(20.6 mg)。
正丁醇部位经大孔吸附树脂D101,以水,20%乙醇,50%乙醇,70%乙醇,95%乙醇梯度洗脱,各部分合并,减压浓缩,得到20%乙醇部位(10.3 g),50%乙醇部位(28.3 g),70%乙醇部位(36.5 g),95%乙醇部位(18.4 g)。将各部位经硅胶柱色谱,ODS柱色谱,凝胶柱色谱以及制备高效液相等技术反复分离,从95%乙醇部位得到化合物2(12.3 mg)、化合物3(13.6 mg)、化合物4(12.4 mg)、化合物5(15.7 mg);从70%乙醇部位得到化合物6(10.1 mg)、化合物7(15.1 mg)、化合物8(10.8 mg)、化合物9(33.8 mg);从50%乙醇部位得到化合物10(15.2 mg)、化合物11(16.1 mg)、化合物12(33.8 mg),化合物13(21.3 mg)、化合物14(19.2 mg)、化合物15(40.9 mg)、化合物16(31.8 mg)、化合物17(10.3 mg);从20%乙醇部位得到化合物18(12.8 mg)、化合物19(13.8 mg)、化合物20(10.2 mg)、化合物21(13.2 mg)。
本研究共从丰城鸡血藤石油醚和正丁醇萃取部位分离得到21个化合物,分别为蒲公英赛酮(taraxerone,1),槐角苷(genistein-4′-O-β-glucoside,2),saikoisoflavonoside A(5-hydroxy-4′- methoxyisoflavone-7-O-β-D-glucopyranosyl-(1→6)-β-D-glucopyranoside, 3),鹰嘴豆芽素A 7-O-β-D-呋喃芹菜糖基-(1→5)-β-D-呋喃芹菜糖基(1→6)-β-D-吡喃葡萄糖苷(biochanin A 7-O-β-D-apiofuranosyl-(1→5)-β-D-apiofuranosyl-(1→6)-β-D-Glucopyranoside, 4),刺芒柄花素-7-O-β-D-吡喃半乳糖苷(formononetin-7-O-β-D-Galactopyranoside,5),3′-O-甲基红车轴草素(5,7-dihydroxy-3′,4′-dimethoxyisoflavone,6),鹰嘴豆芽素A 7-O-β-D-呋喃芹菜糖基-(1→2)-β-D-吡喃葡萄糖苷(biochanin A 7-O-β-D-apiofuranosyl-(1→2)-β-D- Glucopyranoside,7),槐属双苷(Sophorabioside,8),槐属双苷(Sophorabioside,9),4′-羟基-3′-甲氧基异黄酮-7-O-β-D-呋喃芹菜糖基- (1→6)-β-D-吡喃葡萄糖苷(4′-hydroxy-3′-methoxy -isoflavone-7-O-β-D-apiofuranosyl-(1→6)-β-D-glucopyranoside,10),樱黄素(Prunetin,11),樱黄素4′-O-β-D-吡喃葡萄糖苷(prunetin 4′-O-β-D-Glucopyranoside,12),红车轴草素-7-O-β-D-吡喃葡萄糖苷(pratensein-7-O-β-D-glucoside,13),8-甲氧基异刺芒柄花素(8-methoxyisoformononetin,14), 染料木素(genistein, 15),红车轴草素(3′- hydroxybiochaninA,16),鹰嘴豆芽素A(biochanin A,17),5,7-二羟基-3′,5′-二甲氧基异黄酮(5,7-dihydroxy-3′,5′-dimethoxyisoflavone,18),芒柄花苷(Ononin,19),异刺芒柄花素(isoformononetin,20)和木犀草素(5,7,3′,4′-tetrahydroxyflavone,21)。化合物结构见图1。
Figure 1 Structural of compound 1-21 isolated from C.nitida var.hirsutissima
化合物1 白色针晶(甲醇),mp:241~ 243 ℃。HR-ESI-MS m/z 425.357 06[M+H]+。分子式为C30H48O。1H NMR(600 MHz,CDCl3) δ:5.56(1H,dd,J = 8.2, 3.2 Hz,H-15),1.14(3H,s,H-26),1.09(3H,s,H-25),1.08(3H,s,H-24),1.07(3H,s,H-23),0.95(3H,s,H-29),0.91(3H,s,H-30),0.91(3H,s,H-27),0.83(3H,s,H-28);13C NMR(151 MHz,CDCl3) δ:38.5(C-1),34.3(C-2),217.8(C-3),47.7(C-4),55.9(C-5),20.1(C-6),35.2(C-7),39.0(C-8),48.9(C-9),37.9(C-10),17.6(C-11),35.9(C-12),37.8(C-13),157.7(C-14),117.3(C-15),36.8(C-16),37.7(C-17),48.8(C-18),40.8(C-19),29.0(C-20),33.5(C-21、33.1(C-22),26.2(C-23),21.5(C-24),15.0(C-25),29.9(C-26),25.7(C-27),30.0(C-28),33.7(C-29),21.6(C-30)。以上数据与文献[7]报道一致,故鉴定该化合物为蒲公英赛酮(taraxerone)。
化合物2 浅黄色晶体(甲醇),mp:295 ~297 ℃。HR-ESI-MS m/z 433.112 92[M +H]+。分子式为C21H20O10。1H NMR(600 MHz,DMSO-d6) δ:12.90(1H,s,5-OH),9.60(1H,s,7-OH),8.48(1H,s,H-2),7.53(2H,d,J = 8.7 Hz,H-2′,6′),7.02(2H,d,J = 8.7 Hz,H-3′,5′),6.73(1H,d,J = 2.3 Hz,H-8),6.48(1H,d,J = 2.3 Hz,H-6),5.09(1H,d,J = 5.2 Hz,H-1″),3.70(1H,m,H-6″a),3.46(2H,m,H-5″,6″b),3.27(2H,m,H-2″,3″),3.16(1H,m,H-4″);13C NMR(151 MHz,DMSO-d6) δ:154.9(C-2),122.5(C-3),180.4(C-4),161.6(C-5),99.8(C-6),163.1(C-7),94.6(C-8),157.2(C-9),106.1(C-10),122.7 (C-1′),130.2(C-2′,6′),113.8(C-3′,5′),159.2(C-4′),99.6(C-1″),73.1(C-2″),76.4(C-3″),69.6(C-4″),77.2(C-5″),60.6(C-6″)。以上数据与文献[8]报道一致,故鉴定该化合物为槐角苷(genistein-4′-O-β-glucoside)。
化合物3 淡黄色晶体(甲醇),mp:190~192 ℃。HR-ESI-MS m/z 609.543 61[M+H]+。分子式为C28H32O15。1H NMR(600 MHz,DMSO- d6) δ:8.39(1H,s,H-2),8.07(1H,d,J = 8.9 Hz,H-5),7.53(2H,d,J = 8.8 Hz,H-2′,6′),7.24(1H,d,J = 2.3 Hz,H-8),7.16(1H,dd,J = 8.9, 2.3 Hz,H-6),7.00(2H,d,J = 8.9 Hz,H-3′,5′),5.47 ~5.22 (3H,2″,3″,4″-OH),5.07(1H,d,J = 7.4 Hz,H-1″),5.03~4.79(3H,2‴,3‴,4‴-OH),4.48(1H, t,J = 5.7 Hz,6‴-OH),3.93(1H,d,J = 9.3 Hz,H-1‴),3.89(1H,d,J = 9.6 Hz,H-6‴),3.79(3H,s,4′-OCH3);13C NMR(151 MHz,DMSO- d6) δ:154.1(C-2),124.5(C-3),175.2(C-4),127.5(C-5),115.9(C-6),161.8(C-7),104.1(C-8),157.5(C-9),119.0(C-10),123.8(C-1′),130.5(C-2′,6′),114.1(C-3′,5′),159.5(C-4′),100.5(C-1″),73.6(C-2″),76.1(C-3″),70.4(C-4″),76.9(C-5″),68.3(C-6″),109.9(C-1‴),73.8(C-2‴),76.4(C-3‴),70.4(C-4‴),79.2(C-5‴),63.6(C-6‴),55.6(4′-OCH3)。以上数据与文献[9]报道一致,故鉴定该化合物为saikoisoflavonoside A(5-hydroxy-4′-methoxyisoflavone-7-O-β-D-glucopyranosyl-(1→6)-β-D-glucopyranoside)。
化合物4 黄色晶体(甲醇)。HR-ESI-MS m/z 711.633 00[M +H]+。分子式为C32H38O18。1H NMR(600 MHz,DMSO-d6) δ:12.89(1H,s,5-OH),8.43(1H,s,H-2),7.52(2H,d,J = 8.7 Hz,H-2′,6′),7.02(2H,d,J = 8.8 Hz,H-3′,5′),6.74(1H,d,J = 2.2 Hz,H-8),6.47(1H,d,J = 2.2 Hz,H-6),5.04(1H,d,J = 7.4 Hz,H-1″),4.99(1H,d,J = 6.4 Hz,H-1‴),4.81(1H,d,J = 3.1 Hz,H-1⁗),3.93(1H,d,J = 9.3 Hz,H-4‴),3.88(1H,d,J = 9.5 Hz,H-6″),3.86(1H,d,J = 9.5 Hz,H-4⁗),3.79(3H,s,4′-OCH3),3.77(1H,d,J = 3.2 Hz,H-2⁗),3.76(1H,d,J = 3.2 Hz,H-2‴),3.64(1H,d,J = 8.5 Hz,H-4‴),3.61(1H,m,H-5″),3.59(1H,H-4⁗),3.46(1H,dd,J = 11.3, 7.2 Hz,H-5‴),3.39(1H,d,J = 5.7 Hz,H-6″),3.37(1H,d,J = 5.8 Hz,H- 5‴),3.34(1H,m,H-5⁗),3.25(1H,m,H-5⁗),3.28(1H,m,H-3″),3.27(1H,m,H-2″),3.13(1H,m,H-4″);13C NMR(151 MHz,DMSO-d6) δ:154.5(C-2),122.2(C-3),180.4(C-4),161.6(C-5),99.6(C-6),163.0(C-7),94.6(C-8),157.3(C-9),106.1(C-10),122.8(C-1′),130.2(C-2′,6′),113.8(C-3′,5′),159.2(C-4′),99.8(C-1″),73.0(C-2″),76.3(C-3″),69.9(C-4″),75.6(C-5″),67.7(C-6″),109.1(C-1‴),76.4(C-2‴),77.7(C-3‴),73.6(C-4‴),68.8(C-5‴),109.4(C-1⁗),75.9(C-2⁗),78.7(C-3⁗),73.3(C-4⁗),63.2(C-5⁗),55.2(4′-OCH3)。以上数据与文献[10]报道一致,故鉴定该化合物为鹰嘴豆芽素A 7-O-β-D-呋喃芹菜糖基-(1→5)-β-D-呋喃芹菜糖基(1→6)-β-D-吡喃葡萄糖苷(biochanin A 7-O-β-D-apiofuranosyl-(1→5)- β-D-apiofuranosyl-(1→6)-β-D-glucopyranoside)。
化合物5 白色晶体(甲醇)。mp:213 ℃。HR-ESI-MS m/z 431.405 00[M+H]+。分子式为C22H22O9。1H NMR(600 MHz,DMSO-d6) δ:8.43(1H,s,H-2),8.06(1H,d,J = 8.9 Hz,H-5),7.53(2H,d,J = 8.8 Hz,H-2′,6′),7.24(1H,d,J = 2.1 Hz,H-8),7.15(1H,dd,J = 8.9, 2.3 Hz,H-6),7.00(2H,d,J = 8.8 Hz,H-3′,5′),5.11(1H,d,J = 7.10 Hz,H-1″),3.79(3H,s,4′-OCH3),3. 27~3. 77(5H,m,H-2″,3″,4″,5″,6″);13C NMR(151 MHz,DMSO-d6) δ:153.7(C-2),124.0(C-3),174.7(C-4),127.0(C-5),115.6(C-6),161.5(C-7),103.4(C-8),157.1(C-9),118.5(C-10),123.4(C-1′),130.1(C-2′,6′),113.6(C-3′,5′),159.0(C-4′),110.0(C-1″),73.2(C-2″),76.5(C-3″),69.6(C-4″),77.2(C-5″),60.6(C-6″),55.2(4′-OCH3)。以上数据与文献[11]报道一致,故鉴定该化合物为芒柄花素-7-O-β-D-半乳糖苷(formononetin- 7-O-β-D-galactopyranoside)。
化合物6 黄色粉末(甲醇)。mp:196 ~198 ℃。HR-ESI-MS m/z 315.086 31[M+H]+。分子式为C17H14O6。1H NMR(600 MHz,DMSO-d6) δ:12.94(1H, br.s,5-OH),9.73(1H, br.s,7-OH),8.39(1H,s,H-2),7.17(1H,d,J = 2.0 Hz,H-2′),7.12(1H,dd,J = 8.4, 2.0 Hz,H-6′),7.01(1H,d,J = 8.4 Hz,H-5′),6.38(1H,d,J = 2.1 Hz,H-8),6.22(1H,d,J = 2.1 Hz,H-6),3.78(3H,s,3′-OCH3),3.78(3H,s,4′-OCH3);13C NMR(151 MHz,DMSO-d6) δ:154.4(C-2),123.2(C-3),180.0(C-4),162.0(C-5),99.1(C-6),164.6(C-7),93.8(C-8),157.6(C-9),104.3(C-10),122.0(C-1′),112.8(C-2′),148.8(C-3′),148.4(C-4′),111.6(C-5′),121.4(C-6′),55.6(3′-OCH3),55.6(4′-OCH3)。以上数据与文献[12]报道一致,故鉴定该化合物为3′-O-甲基红车轴草素(5, 7-dihydroxy-3′, 4′-dimethoxyisoflavone)。
化合物7 黄色晶体(甲醇)。HR-ESI-MS m/z 601.152 78 [M+Na]+。分子式为C27H30O14。1H NMR(600 MHz,DMSO-d6) δ:12.90(1H,s,5-OH),8.44(1H,s,H-2),7.53(2H,d,J = 8.8 Hz,H-2′,6′),7.03(2H,d,J = 8.9 Hz,H-3′,5′),6.75(1H,d,J = 2.2 Hz,H-8),6.48(1H,d,J = 2.2 Hz,H-6),5.45(1H,d,J = 5.0 Hz,H-1″),5.21(1H,d,J = 1.1 Hz,H-1‴),3.80(3H,s,4′-OCH3);13C NMR(151 MHz,DMSO-d6) δ:155.4(C-2),123.2(C-3),180.9(C-4),162.1(C-5),100.2(C-6),163.4(C-7),95.1(C-8),157.7(C-9),106.6(C-10),122.7(C-1′),130.6(C-2′,6′),114.1(C-3′,5′),159.7(C-4′),100.1(C-1″),76.8(C-2″),76.4(C-3″),70.3(C-4″),76.0(C-5″),63.7(C-6″),109.9(C-1‴),73.8(C-2‴),79.2(C-3‴),73.5(C-4‴),68.2(C-5‴),55.7(4′-OCH3)。以上数据与文献[13]报道一致,故鉴定该化合物为鹰嘴豆芽素A 7-O-β-D-呋喃芹菜糖基-(1→2)-β-D-吡喃葡萄糖苷(biochanin A 7-O-β-D-apiofuranosyl-(1→2)-β-D- glucopyranoside)。
化合物8 白色晶体(甲醇)。mp:248 ℃。HR-ESI-MS m/z 579.170 83 [M +H]+。分子式为C27H30O14。1H NMR(600 MHz,DMSO-d6) δ:12.88(1H,s,5-OH),9.61(1H,s,7-OH),8.40(1H,s,H-2),7.40(2H,d,J = 8.7 Hz,H- 2′,6′),6.83(2H,d,J = 8.7 Hz,H-3′,5′),6.73(1H, br.s,H-8),6.44(1H, br.s,H-6),5.23(1H, br.s,H-1‴),5.03(1H,d,J = 5.2 Hz,H-1″),1.10(3H,d ,J = 6.2 Hz,H-6‴);13C NMR(151 MHz,DMSO-d6) δ:155.2(C-2),122.9(C-3),181.0(C-4),162.0(C-5),100.4(C-6),163.3(C-7),95.1(C-8),158.0(C-9),106.6(C-10),121.5(C-1′),130.6(C-2′,6′),115.6(C-3′,5′),157.7(C-4′),100.2(C-1″),73.5(C-2″),77.0(C-3″),70.4(C-4″),76.1(C-5″),66.9(C-6″),101.1(C-1‴),70.8(C-2‴),71.2(C-3‴),72.6(C-4‴),68.9(C-5‴),18.4(C-6‴)。以上数据与文献[14]报道的一致,故鉴定该化合物为槐属双苷(sophorabioside)。
化合物9 白色晶体(甲醇)。mp:127 ℃。HR-ESI-MS m/z 563.175 92 [M+H]+。分子式为C27H30O13。1H NMR(600 MHz,DMSO-d6) δ:8.39(1H,s,H-2),8.07(1H,d,J = 8.9 Hz,H-5),7.53(2H,d,J = 8.8 Hz,H-2′,6′),7.25(1H,d,J = 2.3 Hz,H-8),7.16(1H,dd,J = 8.9, 2.3 Hz,H-6),7.00(2H,d,J = 8.9 Hz,H-3′,5′),5.23(1H,d,J = 5.5 Hz,H-1‴),5.07(1H,d,J = 7.3 Hz,H-1″),3.79(3H,s,4′ -OCH3);13C NMR(151 MHz,DMSO-d6) δ:153.7(C-2),124.0(C-3),174.7(C-4),127.0(C-5),115.5(C-6),161.4(C-7),103.7(C-8),157.0(C-9),118.5(C-10),123.3(C-1′),130.1(C-2′,6′),113.7(C-3′,5′),159.0(C-4′),100.0(C-1″),75.7(C-2″),73.3(C-3″),70.0(C-4″),76.5(C-5″),63.1(C-6″),109.4(C-1‴),75.9(C-2‴),78.7(C-3‴),73.1(C-4‴),67.8(C-5‴),55.2(4′ -OCH3)。以上数据与文献[15]报道一致,故鉴定该化合物为黄甘草苷(formononetin-7-O-D-apio-β-D-furanosyl-(l→2)-β-D -glucopyranoside)。
化合物10 黄色晶体(甲醇)。HR-ESI-MS m/z 601.152 78 [M+Na]+。分子式为C27H30O14。1H NMR(600 MHz,DMSO-d6) δ:8.39(1H,s,H-2),8.06(1H,d,J = 8.9 Hz,H-5),7.24(H,d,J = 2.3 Hz,H-8),7.17(1H,d,J = 2.4 Hz,H-2′),7.15(H,dd,J = 8.9,2.3 Hz,H-6),7.07(1H,dd,J = 8.0,2.4 Hz,H-6′),6.98(1H,d,J = 8.1 Hz,H-5′),5.06(H,d,J = 7.4 Hz,H -1″),4.82(1H,d,J = 3.2 Hz,H -1‴),3.93(1H,d,J = 9.3 Hz,H -4‴),3.89(2H,d,J = 9.9 Hz,H -6″),3.79(3H,s,3′-OCH3),3.61(1H,d,J = 9.3 Hz,H -4‴),3.38(1H,s,H-5‴);13C NMR(151 MHz,DMSO-d6) δ:154.0(C-2),125.6(C-3),174.6(C-4),127.1(C-5),115.6(C-6),161.4(C-7),103.7(C-8),157.0(C-9),118.5(C-10),123.4(C-1′),113.7(C-2′),147.1(C-3′),147.0(C-4′),115.5(C-5′),122.5(C-6′),100.1(C-1″),73.1(C-2″),76.5(C-3″),70.0(C-4″),75.7(C-5″),67.8(C-6″),109.4(C-1‴),76.0(C-2‴),78.7(C-3‴),73.3(C-4‴),63.7(C-5‴),55.2(3′-OCH3)。以上数据与文献[16]报道一致,故鉴定该化合物为4′-羟基-3′-甲氧基异黄酮-7-O-β-D-呋喃芹菜糖基- (1→6)-β-D-吡喃葡萄糖苷(4′- hydroxy-3′-methoxy-isoflavone-7-O-β-D-apiofuranosyl-(1→6)-β-D- glucopyranoside)。
化合物11 白色晶体(甲醇)。mp:239.5 ℃。HR-ESI-MS m/z 285.075 75[M+H]+。分子式为C16H12O5。1H NMR(600 MHz,DMSO-d6) δ:12.92(1H,s,5-OH),10.91(1H, br.s,4′-OH),8.37(1H,s,H-2),7.50(2H,d,J = 8.8 Hz,H-2′,6′),7.00(2H,d,J = 8.8 Hz,H-3′,5′),6.39(1H,d,J = 2.1 Hz,H-8),6.23(1H,d,J = 2.0 Hz,H-6),3.79(3H,s,7-OCH3);13C NMR(151 MHz,DMSO-d6) δ:154.3(C-2),122.9(C-3),180.1(C-4),162.0(C-5),99.0(C-6),164.4(C-7),93.7(C-8),157.6(C-9),104.4(C-10),122.0(C-1′),130.2(C-2′,6′),113.7(C-3′,5′),159.2(C-4′),55.2(7-OCH3)。以上数据与文献[17]报道一致,故鉴定该化合物为樱黄素(prunetin)。
化合物12 白色晶体(甲醇)。mp:235 ~236 ℃。HR-ESI-MS m/z 447.128 57[M+H]+。分子式为C22H22O10。1H NMR(600 MHz,DMSO-d6) δ:12.91(1H,s,5-OH),8.48(1H,s,H-2),7.53(2H,d,J = 8.8 Hz,H-2′,6′),7.01(2H,d,J = 8.8 Hz,H-3′,5′),6.73(1H,d,J = 2.2 Hz,H-8),6.48(1H,d,J = 2.2 Hz,H-6),5.41(1H,d,J = 5.0 Hz,H-1″),3.79(3H,s,7-OCH3);13C NMR(151 MHz,DMSO-d6) δ:154.9(C-2),122.2(C-3),180.4(C-4),157.2(C-5),99.6(C-6),163.1(C-7),94.6(C-8),159.2(C-9),106.1(C-10),122.7(C-1′),130.2(C-2′,6′),113.8(C-3′,5′),161.6(C-4′),99.8(C-1″),73.1(C-2″),76.4(C-3″),69.6(C-4″),77.2(C-5″),60.6(C-6″),55.2(7-OCH3)。以上数据与文献[18]报道一致,故鉴定该化合物为樱黄素4′-O-β-D-吡喃葡萄糖苷(prunetin 4′-O-β-D-glucopyranoside)。
化合物13 黄色晶体(甲醇)。HR-ESI-MS m/z 463.123 49 [M+H]+。分子式为C22H22O11。1H NMR(600 MHz,DMSO-d6) δ:12.96(1H,s,5-OH),9.18(1H,s,3′-OH),8.45(1H,s,H-2),7.16(1H,d,J = 2.0 Hz,H-2′),7.01(1H,dd,J = 8.2, 2.1 Hz,H-6′),6.84(1H,d,J = 8.1 Hz,H-5′),6.72(1H,d,J = 2.3 Hz,H-8),6.48(1H,d,J = 2.2 Hz,H-6),5.15(1H,d,J = 4.8 Hz,H-1″),3.80(3H,s,4′-OCH3),3.16~3.72(6H,m)。13C NMR(151 MHz,DMSO-d6) δ:154.8(C-2),121.7(C-3),180.5(C-4),161.7(C-5),99.6(C-6),163.0(C-7),94.6(C-8),157.2(C-9),106.1(C-10),122.6(C-1′),115.3(C-2′),146.8(C-3′),147.3(C-4′),113.3(C-5′),121.5(C-6′),99.9(C-1″),73.1(C-2″),76.4(C-3″),69.6(C-4″),77.2(C-5″),60.6(C-6″),55.8(4′-OCH3)。以上数据与文献[19]报道一致,故鉴定该化合物为红车轴草素-7-O-β-D-吡喃葡萄糖苷(pratensein-7-O-β-D-glucoside)。
化合物14 白色晶体(甲醇)。HR-ESI-MS m/z 299.091 4 [M+H]+。分子式为C17H14O5。1H NMR(600 MHz,DMSO-d6) δ:8.41(1H,s,H-2),7.72(1H,d,J = 8.8 Hz,H-5),7.51(2H,d,J = 8.8 Hz,H-2′,H-6′),7.02(1H,d,J = 8.9 Hz,H-6),6.99(2H,d,J = 8.8 Hz,H-3′,H-5′),3.87(3H,s,8-OCH3),3.78(3H,s,7-OCH3);13C NMR(151 MHz,DMSO-d6) δ:155.0(C-2),122.9(C-3),174.7(C-4),120.8(C-5),113.6(C-6),153.1(C-7),134.7(C-8),150.7(C-9),117.3(C-10),124.2(C-1′),130.1(C-2′,C-6′),115.3(C-3′,C-5′),159.0(C-4′),55.2(7-OCH3),60.8(8-OCH3)。以上数据与文献[20]报道一致,故鉴定该化合物为8-甲氧基异刺芒柄花素(8-methoxy-isoformononetin)。
化合物15 白色晶体(甲醇)。mp:265~267 ℃。HR-ESI-MS m/z 271.060 1[M+H]+。分子式为C15H10O5。1H NMR(600 MHz,DMSO-d6) δ:12.95(1H,s,C5-OH),10.85(1H,s,C7-OH),9.59(1H,s,C4′-OH),8.27(1H,s,H-2),7.36(2H,d,J = 8.6 Hz,H-2′,6′),6.82(2H,d,J = 8.6 Hz,H-3′,5′),6.36(1H,d,J = 2.1 Hz,H-8),6.21(1H,d,J = 2.1 Hz,H-6);13C NMR(151 MHz,DMSO-d6) δ:153.9(C-2),121.3(C-3),180.2(C-4),157.6(C-5),99.0(C-6),164.3(C-7),93.7(C-8),157.5(C-9),104.5(C-10),122.3(C-1′),130.2(C-2′,6′),115.1(C-3′,5′),162.0(C-4′)。以上数据与文献[21]报道一致,故鉴定该化合物为染料木素(genistein)。
化合物16 黄色粉末(甲醇)。mp:271 ~273 ℃。HR-ESI-MS m/z 301.070 66 [M+H]+。分子式为C16H12O6。1H NMR(600 MHz,DMSO-d6) δ:8.39(1H,s,H-2),7.17(1H,d,J = 2.0 Hz,H-2′),7.12(1H,dd,J = 8.3, 2.0 Hz,H-6′),7.01(1H,d,J = 8.4 Hz,H-5′),6.38(1H,d,J = 2.1 Hz,H-8),6.22(1H,d,J = 2.1 Hz,H-6),3.78(3H,s,4′-OCH3);13C NMR(151 MHz,DMSO-d6) δ:154.4(C-2),121.4 (C-3),180.0(C-4),162.0(C-5),99.1(C-6),164.6(C-7),93.8(C-8), 157.6(C-9),104.3(C-10),123.2(C-1′),111.6(C-2′),148.8(C-3′),148.4(C-4′),112.8(C-5′),122.0(C-6′),55.6(4′-OCH3)。以上数据与文献[22]报道一致,故鉴定该化合物为红车轴草素(3′-hydroxybiochanin A)。
化合物17 白色晶体(甲醇)。mp:189 ~191 ℃。HR-ESI-MS m/z 285.075 75 [M+H]+。分子式为C16H12O5。1H NMR(600 MHz,DMSO-d6) δ:12.82(1H,s,5-OH),10.73(1H,s,7-OH),8.15(1H,s,H-2),7.24(2H,d,J = 8.6 Hz,H-2′,6′),6.70(2H,d,J = 8.6 Hz,H-3′,5′),6.23(1H,d,J = 2.1 Hz,H-8),6.09(1H,d,J = 2.1 Hz,H-6),3.79(3H,s,4′-OCH3);13C NMR(151 MHz,DMSO-d6) δ:153.9(C-2),121.3(C-3),180.2(C-4),162.0(C-5),93.7(C-6),164.3(C-7),99.0(C-8),157.4(C-9),104.5(C-10),122.3(C-1′),130.2(C-2′,6′),115.1(C-3′,5′),157.6(C-4′),56.1(4′-OCH3)。以上数据与文献[23]报道一致,故鉴定该化合物为鹰嘴豆芽素A(biochanin A)。
化合物18 黄色粉末(甲醇)。HR-ESI-MS m/z 315.086 31 [M+H]+。分子式为C17H14O6。1H NMR(600 MHz,DMSO-d6) δ:12.93(1H,s, 5-OH),8.38(1H,s,H-2),7.16(1H,d,J = 2.0 Hz,H-4′),7.06(2H,d,J = 2.0 Hz,H-2′,6′),6.37(1H,d,J = 2.1 Hz,H-8),6.21(1H,d,J = 2.1 Hz,H-6),3.77(3H,s,5′-OCH3),3.77(3H,s,3′-OCH3);13C NMR(151 MHz,DMSO-d6) δ:154.4(C-2),122.0(C-3),180.0(C-4),162.0(C-5),99.1(C-6),164.6(C-7),93.7(C-8),157.6(C-9),104.3(C-10),123.2(C-1′),121.4(C-2′,6′),148.3(C-3′,5′),111.6(C-4′),55.6(4′-OCH3),55.6(3′-OCH3)。以上数据与文献[24]报道一致,故鉴定该化合物为5,7-二羟基-3′,5′-二甲氧基异黄酮(5,7-dihydroxy-3′,5′- dimethoxyisoflavone)。
化合物19 白色晶体(甲醇)。mp:220~221 ℃。HR-ESI-MS m/z 431. 404 7 [M+H]+。分子式为C22H22O9。1H NMR(600 MHz,DMSO-d6) δ:8.43(1H,s,H-2),8.06(1H,d,J = 8. 9 Hz,H-5),7.53(2H,d,J = 8.8 Hz,H-2′,6′),7.24(1H,d,J = 2.1 Hz,H-8),7.15(1H,dd,J = 8.9, 2.3 Hz,H-6),7.00(2H,d,J = 9.0 Hz,H-3′,5′),5.13,5.17,5.46(3H,2″,3″,4″-OH),5.11(1H,d,J = 7.1 Hz,H-1″),4.63(1H,s,6″-OH),3.79(3H,s,4′-OCH3),3.70(1H,m,H-6″b),3.46(2H,m,H-6″ a,5″),3.20~3.17(3H,m,H-2″,3″,4″);13C NMR(151 MHz,DMSO-d6) δ:154.1(C-2),124.5(C-3),174.7(C-4),127.4(C-5),116.1(C-6),161.9(C-7),103.9(C-8),157.5(C-9),118.9(C-10),123.8(C-1′),130.1(C-2′,6′),113.6(C-3′,5′),159.5(C-4′),100.0(C-1″),73.2(C-2″),76.5(C-3″),68. 6(C-4″),77.2(C-5″),60. 6(C-6″),55. 2(4′-OCH3)。以上数据与文献[5]报道一致,故确定化合物为芒柄花苷(ononin)。
化合物20 淡黄色粉末。mp:218~220 ℃。HR-ESI-MS m/z 269.264 0 [M+H]+。分子式为C16H12O4。1H NMR(600 MHz,DMSO-d6) δ:10.79(1H,s,4′-OH),8.33(1H,s,H-2),7.97(1H,d,J = 8.8 Hz,H-5),7.50(2H,d,J = 8.8 Hz,H-2′,6′),6.94(1H,dd,J = 8.9, 2.2 Hz,H-6),6.87(1H,d,J = 2.3 Hz,H-8),6.87(2H,d,J = 8.8 Hz,H-3′,5′),3.78(3H,s,7-OCH3);13C NMR(151 MHz,DMSO-d6) δ:153.1(C-2),123.2(C-3),174.6(C-4),127.3(C-5),115.2(C-6),162.6(C-7),102.1(C-8),157.4(C-9),116.6(C-10),124.2(C-1′),130.1(C-2′,C-6′),113.6(C-3′,C-5′),159.0(C-4′),55.1(7-OCH3)。以上数据与文献[25]报道一致,故鉴定该化合物为异芒柄花素(isoformononetin)。
化合物21 黄色晶体(甲醇)。mp:329.5 ℃。HR-ESI-MS m/z 287.236 3 [M+H]+。分子式为C15H10O6。1H NMR(600 MHz,DMSO-d6) δ:12.97(1H,s,5-OH),7.41(1H,dd,J = 8.3, 2.3 Hz,H-6′),7.39(1H,d,J = 2.3 Hz,H-2′),6.88(1H,d,J = 8.3 Hz,H-5′),6.65(1H,s,H-3),6.44(1H,d,J = 2.1 Hz,H-8),6.18(1H,d,J = 2.1 Hz,H-6);13C NMR(151 MHz,DMSO-d6) δ:164.4(C-2),102.8(C-3),181.6(C-4),157.3(C-5),98.9(C-6),163.9(C-7),93.9(C-8),161.5(C-9),103.6(C-10),121.3(C-1′),113.3(C-2′),145.8(C-3′),149.9(C-4′),116.0(C-5′),119.0(C-6′)。以上数据与文献[8]报道一致,故鉴定该化合物为木犀草素(iuteolin)。
本研究从丰城鸡血藤藤茎70%乙醇提取物的石油醚和正丁醇萃取部位中分离鉴定了21个化合物,其中17个化合物为首次从该植物中得到。本课题组从丰城鸡血藤藤茎70%乙醇提取物的三氯甲烷、乙酸乙酯[26]、石油醚及正丁醇各萃取部位分离鉴定出共计62个化合物,均以黄酮类化合物居多,且彼此成分重叠较少,系统研究化学成分为其资源的进一步开发利用奠定了基础。
丰城鸡血藤在植物分类上从崖豆藤属(Millettia)分出归到鸡血藤属(Callerya),其理由是鸡血藤属植物具有真正的圆锥花序及单体雄蕊[27-28],但两属植物在化学成分上是否存在显著差异尚不明确,本研究首次将丰城鸡血藤归为鸡血藤属植物进行化学成分研究(之前均为崖豆藤属植物)。既往相关化学成分研究以崖豆藤属植物角度报道(约20种),包括现从崖豆藤属中修订为鸡血藤属植物7种[4],约占鸡血藤属植物1/4。从已报道的两属植物的化学成分看,崖豆藤属与鸡血藤属植物均含有黄酮类、萜类、酚酸类、木脂素类、甾体类和生物碱类等,下一步还将进行两属化学成分的比较研究,从化学成分分类上为鸡血藤属和崖豆藤属的形态学分类提供理论基础,也为两属植物资源的开发利用提供依据。
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