Table 3.
Fragment ions observed in collision-induced dissociation mass spectra of extract of Shizhu ginseng using [M-H]– as the precursor ions
| No. | Precursor ions [M-H]– (m/z) | Product ions (m/z) | Identification |
|---|---|---|---|
| 1 | 961 | 799[M-H-(Glc-H2O)]–; 637[M-H-2(Glc-H2O)]–; 475[M-H-3(Glc-H2O)]–; 161[Glc-H2O]-H]–; 961[M-H]– | 20-Glu-Rf |
| 2 | 931 | 769[M-H-(Glc-H2O)]–; 637[M-H-(Glc-H2O)-(Xyl-H2O)]–; 475[M-H-2(Glc-H2O)-(Xyl-H2O)]–; 931[M-H]–; | Notoginsenoside-R1 |
| 3 | 799 | 637[M-H-(Glc-H2O)]–; 475[M-H-2(Glc-H2O)]–; 161[Glc-H2O]-H]–; 799[M-H]– | Rg1 |
| 4 | 945 | 765[M-H-Glc]–; 637[M-H-(Glc-H2O)-(Rha-H2O)]–; 619[M-H-Glc-(Rha-H2O)]–; 475[M-H-2(Glc-H2O)-(Rha-H2O)]–; 945[M-H]– | Re |
| 5 | 885 | 841[M-H-CO2]–; 799[M-H-Ma]–; 781[M-H-Ma-H2O]– | Malonyl-Rg1 |
| 6 | 1,031 | 987[M-H-CO2]–; 945[M-H-Ma]–; 927[M-H-Ma-H2O]–; 799[M-H-(Rha-H2O)]–; 783[M-H-(Glc-H2O)-Ma]–; 637[M-H-(Rha-H2O)-(Glc-H2O)-Ma]–; 475[M-H-(Rha-H2O)-2(Glc-H2O)-Ma]– | Malonyl-Re |
| 7 | 799 | 637[M-H-(Glc-H2O)]–; 475[M-H-2(Glc-H2O)]–; 619[M-H-(Glc-H2O)-H2O]–; 161[(Glc-H2O)-H]–; 799[M-H]–; | Rf |
| 8 | 1,239 | 1,107[M-H-(Xyl-H2O)]–; 1,077[M-H-(Glc-H2O)]–; 945[M-H-(Xyl-H2O)-(Glc-H2O)]–; 783[M-H-2(Glc-H2O)-(Xyl-H2O)]–; 621[M-H-3(Glc-H2O)-(Xyl-H2O)]–; 459[M-H-4(Glc-H2O)-(Xyl-H2O)]– 1,239[M-H]–; |
Ra3 |
| 9 | 1,341 | 1,341[M-H]–; 1,209[M-H-(Ara/Xyl-H2O)]–; 1,179[M-H-(Glc-H2O)]–; 1,077[M-H-2(Ara/Xyl-H2O)]–; 945[M-H-3(Ara/Xyl-H2O)]–; 783[M-H-3(Ara/Xyl-H2O)-(Glc-H2O)]–; 621[M-H-3(Ara/Xyl-H2O)-2(Glc-H2O)]–; 455 |
Not reported |
| 10 | 769 | 637[M-H-(Ara/Xyl-H2O)]; 619[M-H-Ara/Xyl]–; 475[M-H-(Ara/Xyl-H2O)-(Glc-H2O)]–; 161[(Glc-H2O)-H]– ; 769[M-H]–; | Notoginsenoside-R2 |
| 11 | 783 | 783[M-H]–; 637[M-H-(Rha-H2O)]–; 619[M-H-Rha]–; 475[M-H-(Rha-H2O)-(Glc-H2O)]; 161[(Glc-H2O)-H]– | Rg2 |
| 12 | 1,209 | 1,077[M-H-(Xyl-H2O)]–; 1,047[M-H-(Glc-H2O)]–; 945[M-H-(Xyl-H2O)-(Ara-H2O)]–; 783[M-H-(Xyl-H2O)-(Ara-H2O)-(Glc-H2O)]–; 621[M-H-(Xyl-H2O)-(Ara-H2O)-2(Glc-H2O)]–; 459[M-H-(Xyl-H2O)-(Ara-H2O)-3(Glc-H2O)]–; 323[2(Glc-H2O)-H]–; 1,209[M-H]– | Ra1/Ra2/isomer |
| 13 | 1,209 | 1,077[M-H-(Xyl-H2O)]–; 1,047[M-H-(Glc-H2O)]–; 945[M-H-(Xyl-H2O)-(Ara-H2O)]–; 783[M-H-(Xyl-H2O)-(Ara-H2O)-(Glc-H2O)]–; 621[M-H-(Xyl-H2O)-(Ara-H2O)-2(Glc-H2O)]–; 459[M-H-(Xyl-H2O)-(Ara-H2O)-3(Glc-H2O)]–; 323[2(Glc-H2O)-H]–; 1,209[M-H]– | Ra1/Ra2/isomer |
| 14 | 1,107 | 1,107[M-H]–; 945[M-H-(Glc-H2O)]–; 783[M-H-2(Glc-H2O)]–;459[M-H-4(Glc-H2O)]–; 323[2(Glc-H2O)-H]–; 179[Glc-H]– |
Rb1 |
| 15 | 1,193 | 1,193[M-H]–; 1,149[M-H-CO2]–; 1,107[M-H-Ma]–; 1,089[M-H-Ma-H2O]; 945[M-H-(Glc-H2O)-Ma]–; 927[M-H-(Glc-H2O)-Ma-H2O]–; 783[M-H-2(Glc-H2O)-Ma]–; |
Malonyl-Rb1 |
| 16 | 955 | 955[M-H]–; 793[M-H-(Glc-H2O)]–; 731[M-H-Glc-CO2]–; 613[M-H-2(Glc-H2O)-H2O]–; 588[M-H-2(Glc-H2O)-CO2]–; 570[M-H-2(Glc-H2O)-H2O-CO2]–; 523[M-H-formylglucose-Glc-CO2]– |
Ro |
| 17 | 1,077 | 1,077[M-H]–; 945[M-H-(Ara-H2O)]–; 783[M-H-(Glc-H2O)-(Ara-H2O)]–; 621[M-H-2(Glc-H2O)-(Ara-H2O)]–; 459[M-H-3(Glc-H2O)- (Ara-H2O)]– | Rc |
| 18 | 637 | 475[M-(Glc-H2O)]–;457[M-(Glc-H2O)-H2O]–; 161[(Glc-H2O)-H]– | F1 |
| 19 | 1,163 | 1,120[M-H-CO2]–; 1,059[M-H-Ma-H2O]; 945[M-H-(Ara-H2O)-Ma]–; 783[M-H-(Glc-H2O)-(Ara-H2O)-Ma]–; 621[M-H-2(Glc-H2O)-(Ara-H2O)-Ma]; 459[M-H-3(Glc-H2O)-(Ara-H2O)-Ma]–; 233[Glc+C2OH+H2O]; 1,077[M-H-Ma]–; | Malonyl-Rc |
| 20 | 1,295 | 1,251[M-H-CO2]–; 149[Ara-H]–; 1,209[M-H-Ma]–; 1,191[M-H-Ma-H2O]–;1,077[M-H-(Xyl-H2O)-Ma]–; 1,059[M-H-(Xyl-H2O)-Ma-H2O]–; 945[M-H-(Xyl-H2O)-(Ara-H2O)-Ma]–; 765[M-H-(Xyl-H2O)-(Ara-H2O)-(Glc-H2O)-Ma-H2O]–783[M-H-(Xyl-H2O)-(Ara-H2O)-(Glc-H2O)-Ma]–; 621[M-H-(Xyl-H2O)-(Ara-H2O)-2(Glc-H2O)-Ma]–; 603[M-H-(Xyl-H2O)-(Ara-H2O)-(Glc-H2O)-Ma-H2O]– 323[2(Glc-H2O)-H]–; 131[(Ara/Xyl-H2O)-H]– | Malonyl-Ra1/ Ra2 |
| 21 | 1,077 | 1,077[M-H]–; 945[M-H-(Ara-H2O)]–; 783[M-H-(Glc-H2O)-(Ara-H2O)]–; 621[M-H-2(Glc-H2O)-(Ara-H2O)]–; 459[M-H-3(Glc-H2O)- (Ara-H2O)]– | Rb2 |
| 22 | 1,077 | 1,077[M-H]–; 945[M-H-(Xyl-H2O)]–; 783[M-H-(Glc-H2O)-(Xyl-H2O)]–; 621[M-H-2(Glc-H2O)-(Xyl-H2O)]–; 459[M-H-3(Glc-H2O)- (Xyl-H2O)]– | Rb3 |
| 23 | 1,163 | 1,120[M-H-CO2]–; 1,059[M-H-Ma-H2O]; 945[M-H-(Ara-H2O)-Ma]–; 783[M-H-(Glc-H2O)-(Ara-H2O)-Ma]–; 621[M-H-2(Glc-H2O)-(Ara-H2O)-Ma]; 459[M-H-3(Glc-H2O)-(Ara-H2O)-Ma]–; 233[Glc+C2OH+H2O]; 1,077[M-H-Ma]–; | Malonyl-Rb2 |
| 24 | 1,295 | 1,251[M-H-CO2]–; 149[Ara-H]–; 1,209[M-H-Ma]–; 1,191[M-H-Ma-H2O]–; 1,077[M-H-(Xyl-H2O)-Ma]–; 1,059[M-H-(Xyl-H2O)-Ma-H2O]–; 945[M-H-(Xyl-H2O)-(Ara-H2O)-Ma]–; 765[M-H-(Xyl-H2O)-(Ara-H2O)-(Glc-H2O)-Ma-H2O]–783[M-H-(Xyl-H2O)-(Ara-H2O)-(Glc-H2O)-Ma]–; 621[M-H-(Xyl-H2O)-(Ara-H2O)-2(Glc-H2O)-Ma]–; 603[M-H-(Xyl-H2O)-(Ara-H2O)-(Glc-H2O)-Ma-H2O]– 323[2(Glc-H2O)-H]–; 131[(Ara/Xyl-H2O)-H]– | Malonyl-Ra1/ Ra2 |
| 25 | 1,149 | 1,149[M-H]–; 1,107[M-AC-H2O]–; 963[M-(Glc-H2O)-AC]–; 945[M-(Glc-H2O)-AC-H2O]–; 783[M-2(Glc-H2O)-AC-H2O]–;621[M-3(Glc-H2O)-AC-H2O]–459[M-4(Glc-H2O)-AC-H2O]– | AC-Rb1 |
| 26 | 1,163 | 1,120[M-H-CO2]–;1,077[M-H-Ma]–; 1,059[M-H-Ma-H2O]–; 945[M-H-(Xyl-H2O)-Ma]–; 783[M-H-(Glc-H2O)-(Xyl-H2O)-Ma]–; 621[M-H-2(Glc-H2O)-(Xyl-H2O)-Ma]–; 459[M-H-3(Glc-H2O)-(Xyl-H2O)-Ma]–; 233[Glc+C2OH+H2O] | Malonyl-Rb3 |
| 27 | 945 | 783[M-H-(Glc-H2O)]–;621[M-H-2(Glc-H2O)]–; 945[M-H]– 459[M-H-3(Glc-H2O)]–; 161[(Glc-H2O)-H]–; 179[Glc-H]–; |
Rd |
| 28 | 1,119 | 1,077[M-AC]–; 1,059[M-AC-H2O]–; 945[M-(Ara-H2O)-AC]–; 783[M-(Ara-H2O)-(Glc-H2O)-AC]–; 621[M-(Ara-H2O)-2(Glc-H2O)-AC]–; 459[M-(Ara-H2O)-3(Glc-H2O)-AC]– |
Rs1/Rs2 |
| 29 | 1,031 | 987[M-H-CO2]–; 945[M-H-Ma]–; 927[M-H-Ma-H2O]–; 783[M-H-(Glc-H2O)-Ma]–;621[M-H-2(Glc-H2O)-Ma]–459[M-H-3(Glc-H2O)-Ma]– | Malonyl-Rd |
| 30 | 1,119 | 1,077[M-AC]–; 1,059[M-AC-H2O]–; 945[M-(Ara-H2O)-AC]–; 783[M-(Ara-H2O)-(Glc-H2O)-AC]–; 621[M-(Ara-H2O)-2(Glc-H2O)-AC]–; 459[M-(Ara-H2O)-3(Glc-H2O)-AC]– |
Rs1/Rs2 |
Glc, β-D-glucose; Ara(p), α-L-arabinose (pyranose); Ara(f), α-L-arabinose (furanose); Xyl, β-D-xylose; Rha, α-L-rhamnose; AC, 6-O-acetyl; GlcUA, β-D-glucuronide.