ピーク情報
はつか大根 根
pos
|
Peak #6084 MN MID: SE202_S11_M90 |
m/z: 359.07609, RT: 54.73, 強度: 2330, ログ強度: -0.08, アダクト: [M+H]+, 共有数(同様のピークを含むサンプル数): 2 |
DB検索結果: (23 names) Linderoflavone A;Epiphyllic acid;Phellinsin A;Asparasone A;Dalpalatin;Laxanthone II;Succinyldisalicylic acid;Excelsione;Phomopsidone;5-Hydroxy-7,2',4'-trimethoxy-3',6'-diketoflavone;3,8-dimethoxy-5,7-... |
DBごとのヒット数: ALL 22 KG 1 KN 19 HM 2 |
FlavonoidSearch最大スコア MS2: 0.133, MS3: 0.143 |
DB検索結果
ppm
組成式 | 分子量 | 誤差(Δppm) | 候補化合物名(代表で最短名を記載) | 化合物ID |
---|---|---|---|---|
C18H14O8 | 358.06887 | -0.160 | Linderoflavone A | FlavonoidViewer: FL3FGCNS0013 KNApSAcK: C00004004 LipidMAPS: LMPK12111480 |
C18H14O8 | 358.06887 | -0.160 | Epiphyllic acid | KNApSAcK: C00036115 |
C18H14O8 | 358.06887 | -0.160 | Asparasone A | KNApSAcK: C00050332 |
C18H14O8 | 358.06887 | -0.160 | Phellinsin A | KNApSAcK: C00015662 |
C18H14O8 | 358.06887 | -0.160 | Dalpalatin | FlavonoidViewer: FLIAELNS0002 KNApSAcK: C00009864 LipidMAPS: LMPK12050424 |
C18H14O8 | 358.06887 | -0.160 | Succinyldisalicylic acid | HMDB: HMDB0251143 |
C18H14O8 | 358.06887 | -0.160 | Laxanthone II | KNApSAcK: C00037411 |
C18H14O8 | 358.06887 | -0.160 | Excelsione | KNApSAcK: C00039196 |
C18H14O8 | 358.06887 | -0.160 | 5-Hydroxy-7,2',4'-trimethoxy-3',6'-diketoflavone | FlavonoidViewer: FL3FQUNS0001 KNApSAcK: C00004107 LipidMAPS: LMPK12111513 |
C18H14O8 | 358.06887 | -0.160 | 2-(1,3-Benzodioxol-5-yl)-5,7-dihydroxy-3,8-dimethoxy-4H-1-benzopyran-4-one | FlavonoidViewer: FL5FFCNS0036 KNApSAcK: C00013513 LipidMAPS: LMPK12113266 |
C18H14O8 | 358.06887 | -0.160 | Przewalskinic acid A | KNApSAcK: C00000623, C00037694 |
C18H14O8 | 358.06887 | -0.160 | (+)-12-Dihydrousararotenoid A | KNApSAcK: C00019052 |
C18H14O8 | 358.06887 | -0.160 | Pollenitin 8-acetate | FlavonoidViewer: FL5FFANS0019 KNApSAcK: C00004924 LipidMAPS: LMPK12113167 |
C18H14O8 | 358.06887 | -0.160 | Versiconal | KEGG: C20507 |
C18H14O8 | 358.06887 | -0.160 | 5,4'-Dihydroxy-3,3'-dimethoxy-6,7-methylenedioxyflavone | FlavonoidViewer: FL5FECNS0040 HMDB: HMDB0029272 KNApSAcK: C00005051 LipidMAPS: LMPK12113021 |
C18H14O8 | 358.06887 | -0.160 | Robustaquinone G | KNApSAcK: C00040165 |
C18H14O8 | 358.06887 | -0.160 | 3,7-Dihydroxy-5,6-dimethoxy-3',4'-methylenedioxyflavone | FlavonoidViewer: FL5FECNS0041 KNApSAcK: C00005052 LipidMAPS: LMPK12113022 |
C18H14O8 | 358.06887 | -0.160 | 5,3'-Dihydroxy-4',5'-dimethoxy-6,7-methylenedioxyisoflavone | FlavonoidViewer: FLIAEGNS0004 KNApSAcK: C00009829 LipidMAPS: LMPK12050420 |
C18H14O8 | 358.06887 | -0.160 | Luteolin 7-lactate | FlavonoidViewer: FL3FACNS0002 KNApSAcK: C00004320 LipidMAPS: LMPK12110733 |
C18H14O8 | 358.06887 | -0.160 | (2E)-2-{6-[(E)-2-Carboxyethenyl]-2,3-dihydroxyphenyl}-3-(3,4-dihydroxyphenyl)prop-2-enoic acid | HMDB: HMDB0242743 |
C18H14O8 | 358.06887 | -0.160 | Actaealactone | KNApSAcK: C00041309 |
C18H14O8 | 358.06887 | -0.160 | 3,5,8,2'-Tetrahydroxy-7-methoxyflavone 8-acetate | FlavonoidViewer: FL5FF8NS0008 KNApSAcK: C00004921 LipidMAPS: LMPK12113074 |
MSnスペクトル情報
Level: 2, プリカーサーm/z: 359.07599 |
Splash: splash10-03di-0009000000-d7cc680d5aaac8fa9b5d |
m/z | Int. | NL | Rel.Int. |
---|---|---|---|
313.12 | 3324 | 46 | 1000 |
344.10 | 1070 | 15 | 321 |
314.10 | 469 | 45 | 141 |
257.09 | 365 | 102 | 109 |
359.13 | 257 | -0 | 77 |
300.09 | 211 | 59 | 63 |
345.23 | 204 | 14 | 61 |
FlavonoidSearch結果
Score | Symbolized Name | MSMS-Category | MSMS-Aglycone |
---|---|---|---|
0.133 | [Chalcone]-A(5OMe)-B(none) | Chalcone | Pedicellin |
0.100 | [Flavonol]-A(2OMe)-B(2OMe) | Flavonol | Quercetin 5,7,3',4'-tetramethyl ether |
0.091 | [Flavone]-A(1OH, 1OMe)-B(3OMe) | Flavone | Prosogerin D |
0.091 | [Flavone]-A(2OMe)-B(1OH, 2OMe) | Flavone | 3'-Hydroxy-7,8,4',5'-tetramethoxyflavone |
0.091 | [Flavone]-A(1OH, 1OMe)-B(3OMe) | Flavone | Corymbosin |
0.091 | [Flavone]-A(1OH, 1OMe)-B(3OMe) | Flavone | Isoetin 7,2',4',5'-tetramethyl ether |
0.091 | [Flavone]-A(1OH, 2OMe)-B(2OMe) | Flavone | 6-Hydroxyluteolin 5,6,3',4'-tetramethyl ether |
0.091 | [Flavone]-A(3OMe)-B(1OH, 1OMe) | Flavone | Ageconyflavone B |
0.091 | [Flavone]-A(3OMe)-B(1OH, 1OMe) | Flavone | 6-Hydroxyluteolin 5,6,7,4'-tetramethyl ether |
0.091 | [Flavone]-A(1OH, 2OMe)-B(2OMe) | Flavone | 6-Hydroxyluteolin 6,7,3',4'-tetramethyl ethe |
0.091 | [Flavone]-A(1OH, 2OMe)-B(2OMe) | Flavone | 5-Hydroxy-2',3',7,8-tetramethoxyflavone |
0.091 | [Flavone]-A(1OH, 2OMe)-B(2OMe) | Flavone | 5-Hydroxy-2',3',7,8-tetramethoxyflavone |
0.091 | [Flavone]-A(1OH, 2OMe)-B(2OMe) | Flavone | 5-hydroxy-7,8,2',5'-tetramethoxyflavone |
0.091 | [Flavone]-A(1OH, 2OMe)-B(2OMe) | Flavone | Altisin |
0.091 | [Flavone]-A(1OH, 2OMe)-B(2OMe) | Flavone | Hypolaetin 7,8,3',4'-tetramethyl ether |
0.091 | [Flavone]-A(1OH, 2OMe)-B(2OMe) | Flavone | 2-(2,4-dimethoxyphenyl)-5-hydroxy-7,8-dimethoxyflavone |
0.091 | [Flavone]-A(4OMe)-B(1OH) | Flavone | 4'-Hydroxy-5,6,7,8-tetramethoxyflavone |
0.091 | [Flavone]-A(1OH, 3OMe)-B(1OMe) | Flavone | 7-Hydroxy-5,6,8,4'-tetramethoxyflavone |
0.091 | [Flavone]-A(1OH, 3OMe)-B(1OMe) | Flavone | Gardenin B |
0.083 | [Isoflavone]-A(1OH, 1OMe)-B(3OMe) | Isoflavone | 7-Hydroxy-6,2',4',5'-tetramethoxyisoflavone |
0.083 | [Isoflavone]-A(1OH, 1OMe)-B(3OMe) | Isoflavone | Robustigenin |
0.083 | [Isoflavone]-A(1OH, 2OMe)-B(2OMe) | Isoflavone | Belamcandin |
0.000 | [Aurone]-A(2OH, 1Methyl)-B(3OMe) | Aurone | 4,6-Dihydroxy-5-methyl-3',4',5'-trimethoxyaurone |
0.000 | [Aurone]-A(2OH, 1Methyl)-B(3OMe) | Aurone | 4,6-Dihydroxy-7-methyl-3',4',5'-trimethoxyaurone |
0.000 | [beta-Hydroxy(or Oxodihydro)chalcone]-A(3OMe)-B(1([@@]-Methylenedioxy)) | beta-Hydroxy(or Oxodihydro)chalcone | Ponganone X |
0.000 | [Flavanone]-A(1OH, 1(2,3-Dihydroxy-3-methylbutyl))-B(1OH) | Flavanone | Brosimacutin A |
0.000 | [Flavanone]-A(2OMe, 1Methyl)-B(2OMe) | Flavanone | 2',4',5,7-Tetramethoxy-8-methylflavanone |
0.000 | [UBR-type derivative / [2',5']-Benzoquinonyl-type Flavanone]-A(1OH, 1OMe, 2Methyl)-B(1OMe) | UBR-type derivative / [2',5']-Benzoquinonyl-type Flavanone | Scaberin |
0.000 | [Flavone]-A(2OH, 2Methyl)-B(1OH, 2OMe) | Flavone | 5,7,3'-Trihydroxy-4',5'-dimethoxy-6,8-dimethylflavone |
0.000 | [Flavone]-A(2OH, 2OMe)-B(1([@@]-Methylenedioxy)) | Flavone | Linderoflavone A |
0.000 | [UBR-type derivative / [3',6']-Benzoquinonyl-type Flavone]-A(1OH, 1OMe)-B(2OMe) | UBR-type derivative / [3',6']-Benzoquinonyl-type Flavone | 5-Hydroxy-7,2',4'-trimethoxy-3',6'-diketoflavone |
0.000 | [Dihydroflavonol]-A(2OH)-B(1OH)-C(1(O-Isobutyroyl)) | Dihydroflavonol | 3,5,7,3'-Tetrahydroxyflavanone 3-O-Isobutyrate |
0.000 | [Flavonol (3-OMe)]-A(1OMe)-B(1OH, 2OMe) | Flavonol | 4'-Hydroxy-3,7,3',5'-tetramethoxyflavone |
0.000 | [Flavonol (3-OMe)]-A(1OH, 1OMe)-B(2OMe) | Flavonol | Santoflavone |
0.000 | [Flavonol (3-OMe)]-A(1OH, 1OMe)-B(2OMe) | Flavonol | Quercetin 3,5,3',4'-tetramethyl ether |
0.000 | [Flavonol (3-OMe)]-A(2OMe)-B(1OH, 1OMe) | Flavonol | Quercetin 3,5,7,3'-tetramethyl ether |
0.000 | [Flavonol (3-OMe)]-A(2OMe)-B(1OH, 1OMe) | Flavonol | Quercetin 3,5,7,4'-tetramethyl ether |
0.000 | [Flavonol (3-OMe)]-A(1OH, 1OMe)-B(2OMe) | Flavonol | Retusin(Ariocarpus) |
0.000 | [Flavonol (3-OMe)]-A(1OH, 1OMe, 1Methyl)-B(1OH, 1OMe) | Flavonol | 6-C-Methylquercetin 3,7,3'-trimethyl ether |
0.000 | [Flavonol (3-OMe)]-A(1OH, 1OMe, 1Methyl)-B(1OH, 1OMe) | Flavonol | 5,4'-Dihydroxy-3,7,3'-trimethoxy-8-methylflavone |
0.000 | [Flavonol (3-OMe)]-A(1OH, 1OMe, 2Methyl)-B(2OH) | Flavonol | 2-(3,4-Dihydroxyphenyl)-5-hydroxy-3,7-dimethoxy-6,8-dimethyl-4H-1-benzopyran-4-one |
0.000 | [Flavonol (3-OMe)]-A(2OH, 2Methyl)-B(1OH, 1OMe) | Flavonol | 5,7,4'-Trihydroxy-3,3'-dimethoxy-6,8-dimethylflavone |
0.000 | [Flavonol (3-OMe)]-A(1OH, 2OMe)-B(1OMe) | Flavonol | 6-Hydroxykaempferol 3,5,7,4'-tetramethyl ether |
0.000 | [Flavonol (3-OMe)]-A(1OH, 2OMe)-B(1OMe) | Flavonol | Penduletin 4'-methyl ether |
0.000 | [Flavonol (3-OMe)]-A(1OH, 2OMe, 1Methyl)-B(1OH) | Flavonol | 8-C-Methyl-6-hydroxykaempferol 3,6,7-trimethyl ether |
0.000 | [Flavonol (3-OMe)]-A(1OH, 1([@@]-Methylenedioxy))-B(1OH, 1OMe) | Flavonol | 5,4'-Dihydroxy-3,3'-dimethoxy-6,7-methylenedioxyflavone |
0.000 | [Flavonol]-A(1OMe, 1([@@]-Methylenedioxy))-B(1OH, 1OMe) | Flavonol | 3,3'-Dihydroxy-5,4'-dimethoxy-6,7-methylenedioxyflavone |
0.000 | [Flavonol]-A(1OH, 2OMe)-B(1([@@]-Methylenedioxy)) | Flavonol | 3,7-Dihydroxy-5,6-dimethoxy-3',4'-methylenedioxyflavone |
0.000 | [Flavonol (3-OMe)]-A(1OH, 2OMe)-B(1OMe) | Flavonol | 5-Hydroxy-3,7,8,2'-tetramethoxyflavone |
0.000 | [Flavonol (3-OMe)]-A(1OH, 2OMe)-B(1OMe) | Flavonol | Flindulatin |
0.000 | [Flavonol (3-OMe)]-A(1OH, 2OMe, 1Methyl)-B(1OH) | Flavonol | 5-Hydroxy-2-(4-hydroxyphenyl)-3,7,8-trimethoxy-6-methyl-4H-1-benzopyran-4-one |
0.000 | [Flavonol (3-OMe)]-A(2OH, 1OMe)-B(1([@@]-Methylenedioxy)) | Flavonol | 3,8-Dimethoxy-5,7-dihydroxy-3',4'-methylenedioxyflavone |
0.000 | [Flavonol (3-OMe)]-A(1OH, 3OMe)-B(none) | Flavonol | 5-Hydroxy-3,6,7,8-tetramethoxyflavone |
0.000 | [CCS-type derivative / [3,2']-Formyloxidoflavone]-A(2OH, 1OMe)-B(2OH) | CCS-type derivative / [3,2']-Formyloxidoflavone | Distemonanthin |
0.000 | [Flavan 3-ol]-A(2OH, 1(C-Prenyl))-B(2OH) | Flavan 3-ol | 6-Prenylcatechin |
0.000 | [Flavan 3-ol]-A(2OH, 1(C-Prenyl))-B(2OH) | Flavan 3-ol | 8-Prenylcatechin |
0.000 | [Isoflavone]-A(1OH, 1([@@]-Methylenedioxy))-B(1OH, 2OMe) | Isoflavone | 5,3'-Dihydroxy-4',5'-dimethoxy-6,7-methylenedioxyisoflavone |
0.000 | [Isoflavone]-A(2OH, 1OMe)-B(1OMe, 1([@@]-Methylenedioxy)) | Isoflavone | Dalpalatin |
0.000 | [Isoflavanone]-A(1OH, 1(3-hydroxy-3-methylbutyl))-B(2OH) | Isoflavanone | 7,2',4'-Trihydroxy-8-(3-hydroxy-3-methylbutyl)isoflavanone |
0.000 | [Rotenone]-A(1OH, 1OMe)-B(2OMe) | Rotenone | Sermundone |
0.000 | [12a-Hydroxyrotenone]-A(1OMe)-B(2OMe) | 12a-Hydroxyrotenone | 12a-Hydroxymunduserone |
0.000 | [4-phenylcoumarin]-A(1OH, 2OMe)-B(2OMe) | 4-phenylcoumarin | 8-Hydroxy-5,7,3',4'-tetramethoxy-4-phenylcoumarin |
0.000 | [4-phenylcoumarin]-A(3OMe)-B(1OH, 1OMe) | 4-phenylcoumarin | 3'-Hydroxy-5,7,8,4'-tetramethoxy-4-phenylcoumarin |
Level: 3, プリカーサーm/z: 313.11749 |
Splash: splash10-0a4i-0090000000-714dd2b3d6a46eb1e5b8 |
m/z | Int. | NL | Rel.Int. |
---|---|---|---|
257.07 | 2300 | 56 | 1000 |
247.11 | 177 | 66 | 76 |
258.19 | 123 | 55 | 53 |
FlavonoidSearch結果
Score | Symbolized Name | MSMS-Category | MSMS-Aglycone |
---|---|---|---|
0.143 | [Coumestan]-A(1OH)-B(2OMe) | Coumestan | 3-Hydroxy-8,9-dimethoxycoumestan |
0.143 | [Coumestan]-A(1OH)-B(2OMe) | Coumestan | Wairol |
0.045 | [Isoflavone]-A(1OMe)-B(2OMe) | Isoflavone | Cabreuvin |
0.000 | [Flavone]-A(1OMe)-B(2OMe) | Flavone | 7,3',4'-Trimethoxyflavone |
0.000 | [Flavone]-A(1OMe)-B(2OMe) | Flavone | 7,2',4'-Trimethoxyflavone |
0.000 | [Flavone]-A(2OMe)-B(1OMe) | Flavone | 5,6,2'-Trimethoxyflavone |
0.000 | [Flavone]-A(1OMe)-B(2OMe) | Flavone | 6,2',3'-Trimethoxyflavone |
0.000 | [Flavone]-A(2OMe)-B(1OMe) | Flavone | 5,6,3'-Trimethoxyflavone |
0.000 | [Flavone]-A(none)-B(3OMe) | Flavone | 3',4',5'-Trimethoxyflavone |
0.000 | [Flavone]-A(2OMe)-B(1OMe) | Flavone | 5,7,2'-Trimethoxyflavone |
0.000 | [Flavone]-A(2OMe)-B(1OMe) | Flavone | Apigenin 5,7,4'-trimethyl ether |
0.000 | [Flavone]-A(3OMe)-B(none) | Flavone | Baicalein 5,6,7-trimethyl ether |
0.000 | [Flavone]-A(3OMe)-B(none) | Flavone | Norwogonin 5,7,8-trimethyl ether |
0.000 | [Chalcone]-A(none)-B(2OH, 1OMe, 1Formyl, 1Methyl) | Chalcone | 3-Formyl-4,6-dihydroxy-2-methoxy-5-methylchalcone |
0.000 | [Chalcone]-A(2OMe)-B(1([@@]-Methylenedioxy)) | Chalcone | 3,4-Methylenedioxy-2',4'-dimethoxychalcone |
0.000 | [2'-Hydroxychalcone]-A(2OH, 1OMe, 1Formyl, 1Methyl)-B(none) | 2'-Hydroxychalcone | Leridal chalcone |
0.000 | [Chalcone]-A(2OMe, 1([@@]-Methylenedioxy))-B(none) | Chalcone | Helilandin A |
0.000 | [beta-Hydroxy(or Oxodihydro)chalcone]-A(1([@@]-Methylenedioxy))-B(1([@@]-Methylenedioxy)) | beta-Hydroxy(or Oxodihydro)chalcone | Galiposin |
0.000 | [UBR-type derivative / 2',6'-Dioxo-3'-enyl-0-hydroxy-type Chalcone]-A(1OMe, 3Methyl)-B(none) | UBR-type derivative / 2',6'-Dioxo-3'-enyl-0-hydroxy-type Chalcone | Desmosdumotin C |
0.000 | [Flavanone]-A(1OH, 1OMe, 1Formyl, 1Methyl)-B(none) | Flavanone | Leridal |
0.000 | [Flavanone]-A(1OH, 1OMe, 1Formyl, 1Methyl)-B(none) | Flavanone | Desmosflavanone II |
0.000 | [Flavone]-A(1OH, 1OMe)-B(1([@@]-Methylenedioxy)) | Flavone | Prosogerin A |
0.000 | [Flavone]-A(1OH, 1OMe)-B(1([@@]-Methylenedioxy)) | Flavone | 6-Hydroxy-7-methoxy-3',4'-methylenedioxyflavone |
0.000 | [Flavone]-A(1OH, 1OMe, 2Methyl)-B(1OH) | Flavone | 5,2'-Dihydroxy-7-methoxy- 6,8-dimethylflavone |
0.000 | [Flavone]-A(1OH, 1OMe, 1Methyl)-B(1OMe) | Flavone | 8-Demethyleucalyptin |
0.000 | [Flavone]-A(1OH, 1OMe, 2Methyl)-B(1OH) | Flavone | Sideroxylin |
0.000 | [Flavone]-A(1OH, 1OMe)-B(1([@@]-Methylenedioxy)) | Flavone | 5-Hydroxy-7-methoxy-3',4'-methylenedioxyflavone |
0.000 | [Flavonol (3-OMe)]-A(1OH)-B(1([@@]-Methylenedioxy)) | Flavonol | 3-Hydroxy-7-methoxy-3',4'-methylenedioxyflavone |
0.000 | [Flavonol (3-OMe)]-A(2OMe)-B(none) | Flavonol | Galangin 3,5,7-trimethyl ether |
0.000 | [Flavonol (3-OMe)]-A(2OH, 2Methyl)-B(none) | Flavonol | 5,7-Dihydroxy-3-methoxy-6,8-dimethylflavone |
0.000 | [Flavonol]-A(1OH, 1OMe, 2Methyl)-B(none) | Flavonol | 3,5-Dihydroxy-7-methoxy-6,8-dimethylflavone |
0.000 | [Isoflavone]-A(1OH)-B(1OMe, 1([@@]-Methylenedioxy)) | Isoflavone | Cuneatin |
0.000 | [Isoflavone]-A(1OH, 1OMe)-B(1([@@]-Methylenedioxy)) | Isoflavone | Fujikinetin |
0.000 | [Isoflavone]-A(1OH, 1OMe)-B(1([@@]-Methylenedioxy)) | Isoflavone | Maximaisoflavone E |
0.000 | [Isoflavone]-A(1OH, 1OMe, 1Methyl)-B(1OMe) | Isoflavone | 7-Hydroxy-5,4'-dimethoxy-8-methylisoflavone |
0.000 | [Isoflavone]-A(1OMe, 1([@@]-Methylenedioxy))-B(1OH) | Isoflavone | Betavulgarin |
0.000 | [Isoflavone]-A(1OH, 1([@@]-Methylenedioxy))-B(1OMe) | Isoflavone | Irisone A |
0.000 | [Isoflavone]-A(1OMe, 1([@@]-Methylenedioxy))-B(1OH) | Isoflavone | Irisolone |
0.000 | [UBR-type derivative / [9,10]-Benzoquinonyl-type Pterocarpene]-A(1OMe)-B(1OMe) | UBR-type derivative / [9,10]-Benzoquinonyl-type Pterocarpene | 4-Deoxybryaquinone |
0.000 | [Pterocarpene]-A(1OH, 1OMe)-B(1([@@]-Methylenedioxy)) | Pterocarpene | 3-Hydroxy-4-methoxy-8,9-methylenedioxypterocarpene |
0.000 | [Pterocarpene]-A(1OMe)-B(2OMe) | Pterocarpene | Bryacarpene 5 |
0.000 | [6-Hydroxydehydrorotenone]-A(2OH, 1Methyl)-B(none) | 6-Hydroxydehydrorotenone | Boeravinone B |
0.000 | [4-phenylcoumarin]-A(2OMe)-B(1OMe) | 4-phenylcoumarin | 5,7,4'-Trimethoxy-4-phenylcoumarin |
0.000 | [CCS-type derivative / [5,2']-Epoxy-4-phenylcoumarin]-A(1OMe)-B(1OH, 1OMe) | CCS-type derivative / [5,2']-Epoxy-4-phenylcoumarin | 5'-Hydroxy-7,4'-dimethoxy-5,2'-oxido-4-phenylcoumarin |