Table 2.
RT (min) | Tentative Metabolite a | UHPLC-LTQ-IT-MS/MS | UPLC-Q-TOF-MS | ID d | |||||
---|---|---|---|---|---|---|---|---|---|
[M − H]− | [M + H]+ | MSn Fragment Ions b | UV λmax (nm) | Measured [M − H]− | M. F. | Error (mDa) c | |||
7.05 | N.I. (1) | 563 | 565 | 563 > 282 > 265 | 296, 321, 504 | - | - | - | - |
8.01 | N.I. (2) | 1174 | 1176 | - | 264, 317 | - | - | - | - |
8.76 | Notoginsenoside R1 | 977 | 933 | 977 > 931 | 277 | 931.5114 | C43H80O21 | 0.2 | STD |
9.18 | Ginsenoside-Re | 991 | 947 | 991 > 945 > 779 | 278 | 945.5423 | C48H80O18 | 0.9 | STD |
9.56 | Malonyl-ginsenoside Re | 1031 | 1033 | 1031 > 987 > 945 | 281 | 1031.5427 | C51H84O21 | 0.1 | [25,26] |
10.48 | Ginsenoside Rb1 | 1153 | 1109 | 1153 > 1107 | 271 | 1107.5951 | C54H84O23 | 0.1 | STD |
10.75 | Notoginsenoside R2 | 815 | 771 | 769 > 637 | 264 | 769.4738 | C41H70O13 | −1.8 | [25,26] |
11.29 | Ginsenoside Rd | 991 | 947 | 991 > 946 | 267 | 945.5423 | C48H80O18 | 0.5 | STD |
11.40 | Malonylginsenoside Rd | 1031 | 1033 | 945 > 783 > 621 | 267, 366 | 1031.5423 | C51H84O21 | −0.8 | [26] |
11.60 | Malonylginsenoside Rd/isomer | 1031 | 1033 | 945 > 783 > 621 | 281 | 1031.5427 | C51H84O21 | 0.8 | [26,27] |
11.89 | Notoginsenoside Rt1 | 961 | 917 | 961 > 915 > 783 | 215 | 915.5315 | C47H80O17 | 0.8 | [25] |
12.05 | Notoginsenoside Rt1/isomer | 961 | 917 | 961 > 915 > 783 | 215 | 915.5317 | C47H80O17 | 0.6 | [25] |
12.38 | Malonylnotoginsenoside Rt1 | 1001 | 1003 | - | 216 | - | - | - | [25] |
12.79 | Ginsenoside Rg3 | 829 | 785 | 829 > 783,621 | 217 | 783.4836 | C42H72O13 | -4.0 | STD |
13.70 | N.I. (3) | 869 | 871 | - | 218 | - | - | - | - |
a Metabolites identified based on the VIP analysis results (with a cut-off value of 0.7) and p < 0.05; b MSn fragment patterns detected in negative ion mode; c Differences between observed mass and calculated mass; Error in milliDalton (mDa); Molecular formula (M.F.); d Identification: Standard compound (STD); References (Ref.); Retention time (RT); Not identified (N.I.).