Table 4.
Characteristic ion abundance ratios (Pi/Ri) ± standard deviation (SD) calculated by MS/MS data from 100 ng mL−1 solution of each pure isomer by HPLC-MS/MS methods described in Section 4.4.
| Isomer Pair | Ratio Pi/Ri (m/z) |
Isomer 1 Ratio Value ± SD |
Isomer 2 Ratio Value ± SD |
|---|---|---|---|
| FRA76-GDE5 | 378/590 | 0.01 ± 0.01 | 0.26 ± 0.01 |
| 352/590 | 0.20 ± 0.01 | 0.04 ± 0.01 | |
| 279/590 | 0.11 ± 0.01 | 0.01 ± 0.01 | |
| 253/590 | 0.01 ± 0.01 | 0.21 ± 0.01 | |
| 221/590 | 1.30 ± 0.02 | 0.60 ± 0.01 | |
| 195/590 | 0.09 ± 0.01 | 0.64 ± 0.03 | |
| ELF94-ELF96 | 392/604 | 0.01 ± 0.01 | 0.32 ± 0.01 |
| 366/604 | 0.18 ± 0.01 | 0.01 ± 0.01 | |
| 279/604 | 0.08 ± 0.01 | 0.01 ± 0.01 | |
| 253/604 | 0.01 ± 0.01 | 0.18 ± 0.01 | |
| 221/604 | 1.10 ± 0.06 | 0.44 ± 0.03 | |
| 195/604 | 0.04 ± 0.01 | 0.70 ± 0.02 |