Table 2 Extra compound of pine bark in negative mode
Class | Compound | Retention time, t R (min) | m/z | Reference |
|---|---|---|---|---|
  Unknown |  | 1.314 | 399,353,221,207,161,85 | - |
Phenolic acid | Gallic acid | 1.446 | 169,125,95,79,67 | 35 |
Phenolic acid | Methyl benzoate acid/ caffeic acid | 1.841 | 135, 108,93,80 | 34,55,56,57 |
Phenolic acid | 3,5-dihydroxybenzoic acid | 1.841 | 109,91,65 | 35 |
  Unknown |  | 2.369 | 445,137 | - |
  Unknown |  | 2.634 | 459,137,93 | - |
  Unknown |  | 3.564 | 466,438,303,285,275,231,175,151,125,82,57 | - |
Flavonoid/flavanol | Quercetin derivatives | 4.229 | 506,459,340,151,165,125 | 35 |
  Unknown |  | 4.494 | 350,290,244,135 | - |
  Unknown |  | 5.159 | 291,247,217 | - |
  Unknown |  | 5.424 | 365,321,247,227,165,151 | - |
Flavonoid/flavanol | Catechin | 5.424 | 289,173,162,137,122,109 | 35 |
  Unknown |  | 5.557 | 349,305,287,269,207,189,177,161,147,85 | - |
  Unknown |  | 5.689 | 329,255,227 | - |
Carboxylic acid | Gibbrellin derivatives | 5.821 | 331,287,269,253,244,161 | 34 |
  Unknown |  | 6.085 | 333,273 | - |
Flavonoid | Flavonol derivatives | 7.008 | 315,269 | 35 |
Fatty acid | Decanoic acid | 8.325 | 171,127 | - |
Phenolic acid | Caffeic acid | 13.980 | 179,161,135,109,89 | 35 |