Table 1 The observed and calculated mass numbers of UPLC peaks of LASAP-C
Peak No. | RT (min) | Theoretical mass [M + H]+ | Observed mass [M + H]+ | Mass difference (mmu) | Fragment ions | Identification | Reference |
|---|---|---|---|---|---|---|---|
1 | 0.21 | 118.08680 | 118.08978 | 2.98 | - | betaine | [31] |
2 | 1.65 | 362.12129 | 362.12673 | 5.44 | - | catalpol | [18] |
3 | 7.14 | 549.16081 | 549.15920 | −8.96 | 531.15137/434.18988 | chrysin-6-C-arabinose-8-C-glucose | [32] |
4 | 7.44 | 549.16081 | 549.15912 | −9.04 | 531.15132/434.18978 | chrysin-6-C-glucose-8-C-arabinose | [32] |
5 | 8.84 | 447.09272 | 447.08914 | −3.58 | 271.06377 | baicalin | [32] |
6 | 9.48 | 305.10195 | 305.10251 | 0.56 | 203.03895 | aviprin | [33] |
7 | 9.56 | 335.11251 | 335.11512 | 2.61 | 233.05536 | byakangelicin | [33] |
8 | 10.26 | 461.10782 | 461.10570 | −2.12 | 285.07676 | wogonin-7-O-glucuronide | [32] |
9 | 10.82 | 461.10782 | 461.10585 | −1.97 | 285.07221 | oroxylin A-7-O-glucuronide | [32] |
10 | 12.45 | 271.06065 | 271.06377 | 3.12 | - | baicalenin | [32] |