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. 2015 Dec 30;21(1):50. doi: 10.3390/molecules21010050

Table 3.

Polar phenolic compounds in C. coggygria leaves methanol extract, their corresponding retention times (TR), molecular ions [M − H] and MS2 fragments in LC-MS analysis and quantitative abundance of polar phenolic compounds (μg·mg−1).

Peak No. Compound TR (min) [M − H]− (m/z) MS2 (20 eV) (m/z) Mass Concentration (μg·mg−1) * ± SD Reference
1. Quinic acid 5.019 191.0564 173.0458 2.1 ± 0.01 # [22]
2. Galloyl hexose 6.599 331.0681 191.0576, 169.0153 1.9 ± 0.01 # [22]
3. Gallic acid 7.521 169.0147 125.0251 9.8 ± 0.01 # [5,11]
4. Galloylshikimic acid 8.600 325.0577 169.0148 1.5 ± 0.01 # [22]
5. Protocatechuic acid hexoside 12.314 315.0313 153.0198, 109.0304 1.3 ± 0.08 # [22]
6. Methyl gallate 21.083 183.0300 140.0106, 124.0171 31.2 ± 0.03 # [5]
7. Trigalloyl hexoside 30.510 635.0928 465.0673, 169.0150 <LOQ # [22]
8. Tetragalloyl hexoside 31.774 787.1034 635.0890, 617.0881, 393.0474 1.3 ± 0.10 # [22,25]
9. Tetragalloyl hexoside 32.300 787.1033 635.0898, 617.0776, 393.0458 <LOQ # [22,25]
10. Myricetin glucoside 33.090 479.0849 316.0205, 317.034 2.7 ± 0.09 † [22]
11. Trigallic acid 33.538 473.0369 321.0267, 169.0155 <LOQ # [22]
12. Pentagalloyl hexoside 35.302 939.121 787.1022, 617.0859, 469.0534, 393.0480 <LOQ # [5]
13. Myricetin rhamnoside 36.724 463.0903 316.0206 8.1 ± 0.09 † [22,23]
14. Quercetin glucoside 37.435 463.0901 301.0007 2.5 ± 0.29 † [22]
15. Methyl digallate 38.304 335.0416 183.0303 <LOQ # [22]
16. Methyl trigallate 38.910 469.0533 335.0423, 183.0309 29.7 ± 4.39 # [22]
17. Quercetin rhamnoside 45.941 447.0956 301.0206 35.3 ± 2.09 † [22,23]

* Values (μg·mg−1 dry extract) are presented as means ± standard deviation (n = 3), External standards: gallic acid # and quercetin †; LOQ—limit of quantification.