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| Peak | Retention time (min) | ESI(−)MW | mDa | Fragments of MS2 | Prediction formula |
|---|---|---|---|---|---|
| P1 | 1.68 | 136.1464 [M − H]− | −3.5 | 135, 119, 94 | C8H8O2 |
| P2 | 8.29 | 269.2845 [M − H]− | 0.4 | 269, 254, 226, 210 | C16H14O4 |
| P3 | 5.00 | 165.1732 [M − H]− | 2.8 | 165, 149, 121, | C9H10O3 |
| P4 | 5.92 | 149.1746 [M − H]− | 2.4 | 149, 105 | C9H10O2 |
| P5 | 7.41 | 298.2833 [M − H]− | −0.3 | 298, 252, 254 | C16H13NO5 |
