仇 雪,王萬方,王 飛,姜先俊,魏國柱,李香梅*
1.云南西力生物技術(shù)股份有限公司,云南 昆明 650201
2.國家中藥現(xiàn)代化工程技術(shù)研究中心標(biāo)準(zhǔn)物質(zhì)分中心,云南 昆明 650201
苧葉蒟Piper boehmeriifolium(Miq.) Wall.ex C.DC.為胡椒科胡椒屬植物,生于山谷、山頂、疏林或密林中,產(chǎn)于云南東南、西南和西北部;莖、葉藥用,有祛風(fēng)散寒、舒筋活絡(luò)、散瘀消腫、鎮(zhèn)痛等功效,治胃寒痛、經(jīng)痛、閉經(jīng)、風(fēng)濕骨痛、跌打損傷[1-2]。根據(jù)文獻(xiàn)報道,該屬植物主要含有酰胺生物堿、苯丙素、木脂素、單萜和二萜等化學(xué)成分[3],其精油具有抗氧化、細(xì)胞毒和協(xié)同抑菌等活性[4]。為了進一步明確其化學(xué)成分,該研究對采自云南墨江的苧葉蒟進行了系統(tǒng)的分離,從其乙醇提取物中分離得到15個化合物,分別鑒定為3-(3,4- methylenedioxybenzyl)-4-(3,4-dimethoxybenzyl)-1Hpyrrole-2,5-dione(1)、2E,4E-decadienoylpiperidide(2)、2E-decenoylpiperidide(3)、墻草堿(pellitorine,4)、piperchabamide B(5)、假蒟亭堿(sarmentine,6)、piperdardine(7)、胡椒新堿(piperanine,8)、胡椒堿(piperine,9)、二氫蓽茇明寧堿(4,5- dihydropiperlonguminine,10)、chingchengenamide A(11)、假蓽茇酰胺 B(retrofractamide B,12)、guineensine(13)、蓽茇寧(piperlonguminine,14)和kusunokinin(15)?;衔?是天然產(chǎn)物界中罕見的含氮木脂素,為新化合物,命名為胡椒木脂酰亞胺,結(jié)構(gòu)見圖1;化合物2、3、7、8、10和15為首次從該植物中分離得到。
圖1 化合物1的結(jié)構(gòu)Fig.1 Structure of compound 1
Bruker DRX-500MHz核磁共振光譜儀(德國Bruker公司);LC-IT-TOF質(zhì)譜儀(日本島津公司);Waters 2535型半制備液相色譜儀(美國Waters公司);Agilent 1260型高效液相色譜儀(美國Agilent公司);Büchi旋轉(zhuǎn)蒸發(fā)儀(瑞士Büchi公司);SHB-3循環(huán)式多用真空泵(鞏義市予華儀器有限責(zé)任公司);ZF-1型三用紫外儀(上海精科實業(yè)有限公司);柱色譜硅膠(80~100、200~300目,青島康業(yè)鑫藥用硅膠干燥劑有限公司);GF254硅膠板(50 mm×100 mm,臨沂市海祥化工有限公司);Sephadex LH-20(瑞典Amersham Biosciences公司),制備型反相色譜柱(250 mm×20 mm,10 μm,日本Daisogel公司);RP-C18(40~63 μm,德國Merck公司);色譜級甲醇(上海星可高純?nèi)軇┯邢薰荆黄渌噭┚鶠楣I(yè)用試劑。
苧葉蒟實驗藥材于2018年8月采自云南墨江,原植物由中國科學(xué)院昆明植物研究所陳渝先生鑒定為胡椒科胡椒屬植物苧葉蒟P.boehmeriifolium(Miq.) Wall.ex C.DC,樣品標(biāo)本(BBP0848)儲存在云南西力生物技術(shù)股份有限公司。
取苧葉蒟枝葉10 kg,用95%乙醇常溫提取3次(3 d/次),合并提取液,減壓濃縮得總浸膏200 g??偨嘟?jīng)硅膠柱色譜,用石油醚-丙酮(20∶1、10∶1、5∶1、2∶1、0∶1)梯度洗脫,得到組分Fr.1~6。Fr.1(1.5 g)經(jīng)硅膠柱色譜,用石油醚-丙酮(50∶1、30∶1、20∶1、10∶1)梯度洗脫后,依次經(jīng)RP-C18柱色譜以甲醇-水(80∶20、100∶0)梯度洗脫、半制備HPLC分離純化(70%甲醇-水),得到化合物2(47 mg,tR=30.2 min)、3(66 mg,tR=36.3 min)。Fr.2(2.3 g)依次經(jīng)RP-C18柱色譜甲醇-水(80∶20、100∶0)梯度洗脫、Sephadex LH-20凝膠柱色譜(甲醇)分離,在丙酮中重結(jié)晶得到化合物4(160 mg)。Fr.3(0.9 g)經(jīng)硅膠柱色譜,用石油醚-丙酮(50∶1、20∶1、10∶1、5∶1、2∶1、0∶1)梯度洗脫后得到組分Fr.3-1~3-3。Fr.3-1經(jīng)半制備HPLC純化(86%甲醇),得到化合物5(7 mg,tR=26.0 min)。Fr.3-2依次經(jīng)Sephadex LH-20凝膠柱色譜(甲醇)分離、半制備HPLC純化(68%甲醇),得到化合物6(46 mg,tR=27.6 min)。Fr.3-3經(jīng)RP-C18柱色譜以甲醇-水(50∶50、65∶35、70∶30、80∶20、85∶15、100∶0)梯度洗脫,再經(jīng)半制備HPLC純化(68%甲醇),得到化合物7(14 mg,tR=25.0 min)。Fr.4(8.6 g)經(jīng)RP-C18柱色譜以甲醇-水(80∶20、100∶0)梯度洗脫,得到組分Fr.4-1~4-2。Fr.4-1依次經(jīng)Sephadex LH-20凝膠柱色譜(甲醇)分離、半制備HPLC純化(65%甲醇),得到化合物8(44 mg,tR=23.5 min)。Fr.4-2在丙酮中重結(jié)晶得到化合物9(5.2 g),母液部位依次經(jīng)RP-C18柱色譜以甲醇-水(50∶50、80∶20、100∶0)梯度洗脫、Sephadex LH-20凝膠柱色譜(甲醇)分離,再經(jīng)半制備HPLC分離純化(63%甲醇-水),得到化合物10(14 mg,tR=21.0 min)、11(8 mg,tR=25.2 min)、12(7 mg,tR=29.5 min)和13(38 mg,tR=35.8 min)。Fr.5(1.6 g)依次經(jīng)RP-C18柱色譜以甲醇-水(40∶60、60∶40、70∶30、85∶15、100∶0)梯度洗脫、半制備HPLC分離純化(63%甲醇-水),得到化合物14(14 mg,tR=24.0 min)、15(91 mg,tR=27.0 min)。Fr.6(0.4 g)經(jīng)RP-C18柱色譜以甲醇-水(50∶50、80∶20、100∶0)梯度洗脫,純甲醇梯度部位再經(jīng)Sephadex LH-20凝膠柱色譜(甲醇)分離,得到化合物1(60 mg)。
化合物1:白色粉末。HR-ESI-MS給出準(zhǔn)分子離子峰m/z404.110 6 [M+Na]+(計算值404.110 5),確定分子式為C21H19NO6,計算不飽和度為13;UV光譜在242、280 nm的吸收峰表明化合物1含有芳香環(huán);IR譜顯示出氨基(3299 cm-1)、羰基(1729,1708 cm-1)和芳環(huán)(1609,1516,1504,1490 cm-1)等特征吸收。1H-NMR (500 MHz,CDCl3) 顯示1個活潑氫質(zhì)子信號δH7.23 (1H,s,NH);2組1,2,4-三取代苯環(huán)質(zhì)子信號[δH6.76 (1H,d,J= 8.3 Hz,H-5′),6.70 (1H,dd,J= 8.3,2.0 Hz,H-6′),6.66 (1H,d,J= 2.0 Hz,H-2′)];[δH6.70 (1H,d,J= 8.0 Hz,H-5),6.63 (1H,d,J= 1.8 Hz,H-2),6.61 (1H,dd,J= 8.0,1.8 Hz,H-6)];1個亞甲二氧基質(zhì)子信號δH5.92 (2H,s,OCH2O);2組亞甲基質(zhì)子信號[δH3.68 (2H,s,CH2-7′),δH3.65 (2H,s,CH2-7)]以及2組甲氧基質(zhì)子信號[δH3.85 (3H,s,4′-OCH3),δH3.79 (3H,s,3′-OCH3)]。13C-NMR (125 MHz,CDCl3) 結(jié)合DEPT圖譜顯示21個碳信號,包括2個甲氧基碳信號δC55.9,55.8,3個亞甲基碳信號(包含1個亞甲二氧基碳信號δC101.1),6個烯碳次甲基信號和10個季碳信號(包含2個?;夹盘枽腃171.3,171.2),以上核磁信號并結(jié)合分子式,初步推斷化合物1可能是1個含氮的matairesinol木脂素。利用HMBC圖譜(圖2)對化合物1進一步解析:H-2與C-3/C-4,H-5與C-3/C-4,H-6與C-2/C-4以及H-7與C-2/C-6有相關(guān),此外,亞甲二氧基質(zhì)子信號δH5.92與C-3/C-4有相關(guān),結(jié)合1D NMR給出的芳香質(zhì)子偶合信號,提示結(jié)構(gòu)中存在片段1a(3,4-亞甲二氧基芐基片段)。另外,在HMBC中,H-2′與C-3′/C-4′,H-5′與C-3′/C-4′,H-6′與C-2′/C-4′以 及H-7′與C-2′/C-6′有相關(guān),同時,2個甲氧基質(zhì)子信號δH3.79和δH3.85分別與C-3′和C-4′相關(guān),結(jié)合1D NMR給出的芳香質(zhì)子偶合信號,提示結(jié)構(gòu)中存在片段1b(3,4-二甲氧基芐基片段);活潑氫質(zhì)子信號δH7.23分別與2個?;糃-9、C-9′以及2個sp2季碳C-8、C-8′有相關(guān),結(jié)合該化合物的分子式,推斷結(jié)構(gòu)中存在片段1c(2,5-二氧代吡咯環(huán)片段)。進一步分析HMBC信號,H-7與C-8/C-9和H-7′與C-8′/C-9′有相關(guān),可以將片段1a、1b和1c連接起來,故化合物1的結(jié)構(gòu)確定為3-(3,4-methylenedioxybenzyl)-4- (3,4-dimethoxybenzyl)-1H-pyrrole-2,5-dione,綜合HSQC和HMBC譜信息,對化合物1的全部碳?xì)湫盘栠M行了準(zhǔn)確的歸屬(表1)。經(jīng)過SciFinder Scholar檢索,確定該化合物1是1個新的含氮木脂素化合物,命名為胡椒木脂酰亞胺。
圖2 化合物1的HMBC () 相關(guān)Fig.2 Key HMBC () correlations of compound 1
表1 化合物1的1H-NMR和13C-NMR數(shù)據(jù) (500/125 MHz,CDCl3)Table 1 1H-NMR and 13C-NMR spectral data of compound 1 (500/125 MHz,CDCl3)
化合物2:無色油狀物,ESI-MSm/z: 258 [M+Na]+。1H-NMR (500 MHz,CDCl3)δ: 7.23 (1H,dd,J= 14.8,10.8 Hz,H-3),6.25 (1H,d,J= 14.8 Hz,H-2),6.17 (1H,dd,J= 15.1,11.0 Hz,H-4),6.05 (1H,dt,J= 15.1,7.0 Hz,H-5),3.61 (2H,brs,H-5′),3.48 (2H,brs,H-1′),2.14 (2H,q,J= 7.0 Hz,H-6),1.64 (2H,m,H-3′),1.53~1.59 (4H,m,H-2′,4′),1.41 (2H,m,H-7),1.24~1.34 (4H,m,H-8,9),0.88 (3H,t,J= 7.0 Hz,H-10);13C-NMR (125 MHz,CDCl3)δ: 165.8 (C-1),118.6 (C-2),142.8 (C-3),128.9 (C-4),142.7 (C-5),32.9 (C-6),28.6 (C-7),31.4 (C-8),22.5 (C-9),14.0 (C-10),46.9 (C-1′),26.8 (C-2′),24.7 (C-3′),25.7 (C-4′),43.2 (C-5′)。上述數(shù)據(jù)與文獻(xiàn)報道基本一致[5],故鑒定化合物2為2E,4E-decadienoylpiperidide。
化合物3:無色油狀物,ESI-MSm/z: 260 [M+Na]+。1H-NMR (500 MHz,CDCl3)δ: 6.80 (1H,dt,J= 15.2,7.0 Hz,H-3),6.21 (1H,d,J= 15.2 Hz,H-2),3.58 (2H,brs,H-5′),3.46 (2H,brs,H-1′),2.17 (2H,q,J= 7.0 Hz,H-4),1.63 (2H,m,H-3′),1.50~1.55 (4H,m,H-2′,4′),1.43 (2H,m,H-5),1.18~1.31 (8H,m,H-6~9),0.86 (3H,t,J= 7.0 Hz,H-10);13C-NMR (125 MHz,CDCl3)δ: 165.7 (C-1),120.4 (C-2),146.0 (C-3),32.6 (C-4),28.5 (C-5),29.2 (C-6),29.1 (C-7),31.8 (C-8),22.7 (C-9),14.1 (C-10),46.9 (C-1′),26.7 (C-2′),24.7 (C-3′),25.6 (C-4′),43.1 (C-5′)。上述數(shù)據(jù)與獻(xiàn)報道基本一致[5],故鑒定化合物3為2E- decenoylpiperidide。
化合物4:白色粉末,ESI-MSm/z: 246 [M+Na]+。1H-NMR (500 MHz,CDCl3)δ: 7.19 (1H,dd,J= 14.9,10.2 Hz,H-3),6.12 (1H,m,H-4),6.06 (1H,m,H-5),5.75 (1H,d,J= 14.9 Hz,H-2),5.52 (1H,brs,-NH),3.16 (2H,t,J= 6.5 Hz,H-1′),2.13 (2H,m,H-6),1.79 (1H,m,H-2′),1.41 (2H,m,H-7),1.25~1.35 (4H,m,H-8,9),0.92 (6H,d,J= 6.7 Hz,H-3′,4′),0.88 (3H,t,J= 6.9 Hz,H-10);13C-NMR (125 MHz,CDCl3)δ: 166.7 (C-1),121.9 (C-2),141.5 (C-3),128.4 (C-4),143.5 (C-5),33.1 (C-6),28.7 (C-7),31.6 (C-8),22.7 (C-9),14.2 (C-10),47.2 (C-1′),28.9 (C-2′),20.3 (C-3′,4′)。上述數(shù)據(jù)與文獻(xiàn)報道基本一致[6],故鑒定化合物4為墻草堿。
化合物5:無色油狀物,ESI-MSm/z: 392 [M+Na]+。1H-NMR (500 MHz,CDCl3)δ: 6.89 (1H,d,J= 1.5 Hz,H-13),6.82 (1H,dt,J= 15.1,6.9 Hz,H-3),6.75 (1H,dd,J= 8.0,1.5 Hz,H-17),6.73 (1H,d,J= 8.0 Hz,H-16),6.27 (1H,d,J= 15.8 Hz,H-11),6.23 (1H,dt,J= 15.1,1.6 Hz,H-2),6.03 (1H,dt,J= 15.8,6.9 Hz,H-10),5.93 (2H,s,-OCH2O),3.59 (2H,brs,H-5′),3.47 (2H,brs,H-1′),2.12~2.22 (4H,m,H-4,9),1.64 (2H,m,H-3′),1.53~1.60 (4H,m,H-2′,4′),1.40~1.50 (4H,m,H-5,8),1.30~1.39 (4H,m,H-6,7);13C-NMR (125 MHz,CDCl3)δ: 165.6 (C-1),120.4 (C-2),145.9 (C-3),32.5 (C-4),28.4 (C-5),29.0 (C-6),29.1 (C-7),29.4 (C-8),32.8 (C-9),129.3 (C-10),129.3 (C-11),132.5 (C-12),105.4 (C-13),147.9 (C-14),146.5 (C-15),108.2 (C-16),120.2 (C-17),100.9 (OCH2O),46.9 (C-1′),26.7 (C-2′),24.7 (C-3′),25.6 (C-4′),43.1 (C-5′)。上述數(shù)據(jù)與文獻(xiàn)報道基本一致[7],故鑒定化合物5為piperchabamide B。
化合物6:無色油狀物,ESI-MSm/z: 244 [M+Na]+。1H-NMR (500 MHz,CDCl3)δ: 7.26 (1H,dd,J= 14.7,10.9 Hz,H-3),6.17 (1H,dd,J= 14.9,10.9 Hz,H-4),6.09 (1H,d,J= 14.7 Hz,H-2),6.07 (1H,dt,J= 14.9,7.5 Hz,H-5),3.53 (2H,t,J= 6.9 Hz,H-4′),3.50 (2H,t,J= 6.9 Hz,H-1′),2.14 (2H,q,J= 7.5 Hz,H-6),1.95 (2H,m,H-2′),1.85 (2H,m,H-3′),1.41 (2H,m,H-7),1.23~1.35 (4H,m,H-8,9),0.88 (3H,t,J= 7.0 Hz,H-10);13C-NMR (125 MHz,CDCl3)δ: 165.4 (C-1),120.0 (C-2),142.4 (C-3),128.8 (C-4),143.4 (C-5),33.1 (C-6),26.3 (C-7),24.5 (C-8),22.7 (C-9),14.2 (C-10),46.6 (C-1′),31.5 (C-2′),28.6 (C-3′),46.0 (C-4′)。上述數(shù)據(jù)與文獻(xiàn)報道基本一致[8],故鑒定化合物6為假蒟亭堿。
化合物7:白色粉末,ESI-MSm/z: 336 [M+Na]+。1H-NMR (500 MHz,CDCl3)δ: 7.21 (1H,dd,J= 14.8,10.9 Hz,H-3),6.27 (1H,d,J= 7.8 Hz,H-12),6.66 (1H,d,J= 1.6 Hz,H-9),6.61 (1H,dd,J= 7.8,1.6 Hz,H-13),6.26 (1H,d,J= 14.8 Hz,H-2),6.18 (1H,dd,J= 15.2,10.9 Hz,H-4),6.05 (1H,dt,J= 15.2,7.4 Hz,H-5),5.92 (2H,s,-OCH2O),3.60 (2H,brs,H-5′),3.48 (2H,brs,H-1′),2.65 (2H,t,J= 7.4 Hz,H-7),2.42 (2H,q,J= 7.4 Hz,H-6),1.65 (2H,m,H-3′),1.54~1.59 (4H,m,H-2′,4′);13C-NMR (125 MHz,CDCl3)δ: 165.6 (C-1),119.1 (C-2),142.5 (C-3),129.5 (C-4),141.0 (C-5),35.0 (C-6),35.0 (C-7),135.2 (C-8),108.8 (C-9),147.6 (C-10),145.7 (C-11),108.2 (C-12),121.2 (C-13),101.0 (OCH2O),43.2 (C-1′),25.5 (C-2′),24.7 (C-3′),26.7 (C-4′),46.9 (C-5′)。上述數(shù)據(jù)與文獻(xiàn)報道基本一致[9],故鑒定化合物7為piperdardine。
化合物8:無色油狀物,ESI-MSm/z: 310 [M+Na]+。1H-NMR (500 MHz,CDCl3)δ: 6.78 (1H,dt,J= 15.1,7.3 Hz,H-3),6.71 (1H,d,J= 7.9 Hz,H-10),6.66 (1H,d,J= 1.7 Hz,H-7),6.62 (1H,dd,J= 7.9,1.8 Hz,H-11),6.21 (1H,dt,J= 15.1,1.5 Hz,H-2),5.91 (2H,s,-OCH2O),3.58 (2H,brs,H-5′),3.40 (2H,brs,H-1′),2.68 (2H,t,J= 7.3 Hz,H-5),2.46 (2H,qd,J= 7.3,1.5 Hz,H-4),1.64 (2H,m,H-3′),1.50~1.58 (4H,m,H-2′,4′);13C-NMR (125 MHz,CDCl3)δ: 165.5 (C-1),121.2 (C-2),144.0 (C-3),34.5 (C-4),34.6 (C-5),135.0 (C-6),108.2 (C-7),147.6 (C-8),145.7 (C-9),108.9 (C-10),121.4 (C-11),100.8 (OCH2O),46.9 (C-1′),26.6 (C-2′),24.6 (C-3′),25.6 (C-4′),43.1 (C-5′)。上述數(shù)據(jù)與文獻(xiàn)報道基本一致[5],故鑒定化合物8為胡椒新堿。
化合物9:淺黃色粉末,ESI-MSm/z: 308 [M+Na]+。1H-NMR (500 MHz,CDCl3)δ: 7.39 (1H,dd,J= 14.7,9.0 Hz,H-3),6.97 (1H,d,J= 1.4 Hz,H-7),6.88 (1H,dd,J= 8.0,1.4 Hz,H-11),6.77 (1H,d,J= 8.0 Hz,H-10),6.74 (1H,d,J= 16.0 Hz,H-5),6.72 (1H,dd,J= 16.0,9.0 Hz,H-4),6.43 (1H,d,J= 14.7 Hz,H-2),5.97 (2H,s,-OCH2O),3.63 (2H,brs,H-5′),3.52 (2H,brs,H-1′),1.66 (2H,m,H-3′),1.55~1.62 (4H,m,H-2′,4′);13C-NMR (125 MHz,CDCl3)δ: 165.5 (C-1),120.2 (C-2),142.5 (C-3),125.5 (C-4),138.3 (C-5),131.1 (C-6),105.8 (C-7),148.3 (C-8),148.2 (C-9),108.6 (C-10),122.5 (C-11),101.3 (OCH2O),47.0 (C-1′),26.8 (C-2′),24.7 (C-3′),25.7 (C-4′),43.3 (C-5′)。上述數(shù)據(jù)與文獻(xiàn)報道基本一致[5],故鑒定化合物9為胡椒堿。
化合物10:白色粉末,ESI-MSm/z: 298 [M+Na]+。1H-NMR (500 MHz,CDCl3)δ: 6.84 (1H,dt,J= 15.3,7.4 Hz,H-3),6.72 (1H,d,J= 7.8 Hz,H-5′),6.66 (1H,d,J= 1.6 Hz,H-2′),6.62 (1H,d,J= 7.8 Hz,H-6′),5.92 (2H,s,-OCH2O),5.76 (1H,d,J= 15.3 Hz,H-2),5.44 (1H,brs,-NH),3.14 (2H,t,J= 6.3 Hz,H-1′′),2.68 (2H,t,J= 7.4 Hz,H-5),2.44 (2H,q,J= 7.4 Hz,H-4),1.79 (1H,m,H-2′′),0.92 (6H,d,J= 6.7 Hz,H-3′′,4′′);13C-NMR (125 MHz,CDCl3)δ: 165.8 (C-1),124.2 (C-2),143.3 (C-3),34.1 (C-4),34.4 (C-5),134.9 (C-1′),108.2 (C-2′),147.6 (C-3′),145.8 (C-4′),108.8 (C-5′),121.2 (C-6′),100.8 (OCH2O),46.8 (C-1′′),28.6 (C-2′′),20.1 (C-3′′,4′)。上述數(shù)據(jù)與文獻(xiàn)報道基本一致[10],故鑒定化合物10為二氫蓽茇明寧堿。
化合物11:白色粉末,ESI-MSm/z: 324 [M+Na]+。1H-NMR (500 MHz,CDCl3)δ: 7.17 (1H,dd,J= 15.1,10.3 Hz,H-3),6.72 (1H,d,J= 7.9 Hz,H-5′),6.66 (1H,d,J= 1.5 Hz,H-2′),6.60 (1H,dd,J= 7.9,1.5 Hz,H-6′),6.13 (1H,dd,J= 15.3,10.3 Hz,H-4),6.06 (1H,dt,J= 15.3,6.5 Hz,H-5),5.92 (2H,s,-OCH2O),5.75 (1H,d,J= 15.1 Hz,H-2),5.48 (1H,brs,-NH),3.16 (2H,t,J= 6.3 Hz,H-1′′),2.65 (2H,t,J= 7.4 Hz,H-7),2.42 (2H,dd,J= 7.4,6.5 Hz,H-6),1.80 (1H,m,H-2′′),0.92 (6H,d,J= 6.7 Hz,H-3′′,4′′);13C-NMR (125 MHz,CDCl3)δ: 166.3 (C-1),121.1 (C-2),141.5 (C-3),128.4 (C-4),135.0 (C-5),34.9 (C-6),35.0 (C-7),141.0 (C-1′),108.8 (C-2′),147.5 (C-3′),145.7 (C-4′),108.1 (C-5′),122.2 (C-6′),100.7 (OCH2O),46.9 (C-1′′),28.6 (C-2′′),20.1 (C-3′′,4′′)。上述數(shù)據(jù)與文獻(xiàn)報道基本一致[11],故鑒定化合物11為chingchengenamide A。
化合物12:白色粉末,ESI-MSm/z: 378 [M+Na]+。1H-NMR (500 MHz,CDCl3)δ: 7.19 (1H,dd,J= 14.9,10.3 Hz,H-3),6.89 (1H,d,J= 1.1 Hz,H-2′),6.75 (1H,dd,J= 7.9,1.1 Hz,H-6′),6.73 (1H,d,J= 7.9 Hz,H-5′),6.28 (1H,d,J= 15.8 Hz,H-11),6.13 (1H,dd,J= 15.2,10.3 Hz,H-4),6.06 (1H,m,H-5),6.01 (1H,m,H-10),5.93 (2H,s,-OCH2O),5.74 (1H,d,J= 14.9 Hz,H-2),5.46 (1H,brs,-NH),3.16 (2H,t,J= 6.3 Hz,H-1′′),2.15~2.21 (4H,m,H-6,9),1.44~1.49 (4H,m,H-7,8),1.80 (1H,m,H-2′′),0.92 (6H,d,J= 6.7 Hz,H-3′′,4′′);13C-NMR (125 MHz,CDCl3)δ: 166.3 (C-1),122.0 (C-2),142.7 (C-3),128.9 (C-4),141.2 (C-5),32.7 (C-6),28.9 (C-7),28.6 (C-8),32.8 (C-9),132.3 (C-10),128.4 (C-11),129.5 (C-1′),109.4 (C-2′),147.9 (C-3′),146.6 (C-4′),108.2 (C-5′),120.2 (C-6′),100.9 (OCH2O),46.9 (C-1′′),28.3 (C-2′′),20.1 (C-3′′,4′′)。上述數(shù)據(jù)與文獻(xiàn)報道基本一致[12],故鑒定化合物12為假蓽茇酰胺B。
化合物13:白色粉末,ESI-MSm/z: 406 [M+Na]+。1H-NMR (500 MHz,CDCl3)δ: 7.19 (1H,dd,J= 15.0,10.2 Hz,H-3),6.89 (1H,d,J= 1.4 Hz,H-2′),6.75 (1H,dd,J= 8.0,1.4 Hz,H-6′),6.73 (1H,d,J= 8.0 Hz,H-5′),6.28 (1H,d,J= 15.7 Hz,H-13),6.11 (1H,m,H-4),6.07 (1H,m,H-5),6.04 (1H,m,H-12),5.93 (2H,s,-OCH2O),5.74 (1H,d,J= 15.0 Hz,H-2),5.48 (1H,brs,-NH),3.16 (2H,t,J= 6.5 Hz,H-1′′),2.11~2.19 (4H,m,H-6,11),1.79 (1H,m,H-2′′),1.38~1.47 (4H,m,H-7,10),1.27~1.36 (4H,m,H-8,9),0.92 (6H,d,J= 6.7 Hz,H-3′′,4′′);13C-NMR (125 MHz,CDCl3)δ: 166.4 (C-1),121.8 (C-2),143.1 (C-3),129.4 (C-4),141.3 (C-5),32.9 (C-6),29.0 (C-7),28.7 (C-8),28.9 (C-9),29.3 (C-10),32.9 (C-11),129.3 (C-12),128.3 (C-13),132.5 (C-1′),105.4 (C-2′),146.9 (C-3′),147.9 (C-4′),108.2 (C-5′),120.2 (C-6′),100.9 (OCH2O),46.9 (C-1′′),28.6 (C-2′′),20.1 (C-3′′,4′′)。上述數(shù)據(jù)與文獻(xiàn)報道基本一致[6],故鑒定化合物13為guineensine。
化合物14:白色粉末,ESI-MSm/z: 296 [M+Na]+。1H-NMR (500 MHz,CDCl3)δ: 7.36 (1H,dd,J= 14.8,10.9 Hz,H-3),6.98 (1H,d,J= 1.3 Hz,H-2′),6.89 (1H,dd,J= 8.0,1.3 Hz,H-6′),6.78 (1H,d,J= 8.0 Hz,H-5′),6.77 (1H,d,J= 15.4 Hz,H-5),6.67 (1H,dd,J= 15.4,10.9 Hz,H-4),5.98 (2H,s,-OCH2O),5.91 (1H,d,J= 14.8 Hz,H-2),5.53 (1H,brs,-NH),3.19 (2H,t,J= 6.4 Hz,H-1′′),1.82 (1H,m,H-2′′),0.94 (6H,d,J= 6.6 Hz,H-3′′,4′′);13C-NMR (125 MHz,CDCl3)δ: 166.5 (C-1),123.5 (C-2),141.1 (C-3),124.8 (C-4),138.9 (C-5),131.1 (C-1′),105.9 (C-2′),148.4 (C-3′),148.5 (C-4′),108.7 (C-5′),122.7 (C-6′),101.5 (OCH2O),47.1 (C-1′′),28.8 (C-2′′),20.4 (C-3′′,4′′)。上述數(shù)據(jù)與文獻(xiàn)報道基本一致[13],故鑒定化合物14為蓽茇寧。
化合物15:無色油狀物,ESI-MSm/z: 393 [M+Na]+。1H-NMR (500 MHz,CDCl3)δ: 6.76 (1H,d,J= 8.1 Hz,H-5),6.71 (1H,d,J= 7.9 Hz,H-5′),6.60 (1H,d,J= 1.4Hz,H-2′),6.58 (1H,dd,J= 7.9,1.4 Hz,H-6′),6.57 (1H,dd,J= 8.1,2.0 Hz,H-6),6.47 (1H,d,J= 2.0 Hz,H-2),5.92 (2H,s,-OCH2O),4.15 (1H,dd,J= 9.2,7.1 Hz,H-9a),3.88 (1H,dd,J= 9.2,7.5 Hz,H-9b),3.85 (3H,s,4-OCH3),3.82 (3H,s,3-OCH3),2.96 (1H,dd,J= 14.1,5.2 Hz,H-7′a),2.85 (1H,dd,J= 14.1,7.2 Hz,H-7′b),2.61 (1H,dd,J= 12.7,5.3 Hz,H-7a),2.55 (1H,m,H-8),2.50 (1H,m,H-8′),2.48 (1H,dd,J= 12.7,7.6 Hz,H-7b);13C-NMR (125 MHz,CDCl3)δ: 131.4 (C-1),111.7 (C-2),149.1 (C-3),147.9(C-4),109.5 (C-5),122.3 (C-6),38.3 (C-7),41.2 (C-8),71.3 (C-9),130.4 (C-1′),111.3 (C-2′),147.9(C-3′),146.5 (C-4′),108.2 (C-5′),120.6 (C-6′),34.8 (C-7′),46.5 (C-8′),178.5 (C-9′),101.0 (OCH2O),55.9 (3-OCH3),55.8 (4-OCH3)。上述數(shù)據(jù)與文獻(xiàn)報道基本一致[14],故鑒定化合物15為kusunokinin。
利益沖突所有作者均聲明不存在利益沖突