Table 1 LC–MS/MS characteristics of KZI in MRM mode
No. | Compound | Peak retention time (min) | Mr (relative molar mass) | Precursor ion (m/z) | Product ion (m/z) |
|---|---|---|---|---|---|
1 | 4- O-caffeoylquinate | 16.85 | 354 | 353.08 | 191.05 |
2 | 3-O-caffeoylquinate | 17.46 | 354 | 353.06 | 191.04 |
3 | 5,7,3′,4′-tetrahydroxy-flavonone-3-O-glucoside | 19.14 | 466 | 465.08 | 303.03 |
4 | 3′-methoxy-5,7,4′-trihydroxy-dihydrochalcone-3-O-rutinoside | 20.13 | 628 | 627.41 | 465.19 |
5 | 3,4-di-O-caffeoylisoquinic acid | 25.06 | 516 | 515.05 | 353.06 |
6 | 3,4-di-O-caffeoylquinic acid | 25.81 | 516 | 515.05 | 353.09 |
7 | Liquiritigenin | 27.93 | 256 | 255.06 | 119.04 |
8 | Luteolin | 29.19 | 286 | 285.05 | 150.99 |
9 | Butein | 31.29 | 272 | 271.05 | 135.04 |
10 | Apigenin | 32.44 | 270 | 269.06 | 135.01 |
11 | Methoxyisorhamnetin | 33.51 | 330 | 329.23 | 199.12 |
12 | Kaempferide | 52.71 | 300 | 299.24 | 165.00 |
13 | Vernodalinol | 20.91 | 378 | 401.14 | 277.12 |
14 | Vernodalol | 22.89 | 392 | 415.11 | 291.10 |
15 | Vernodalin | 25.73 | 360 | 361.17 | 259.10 |