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Table 3 Qualitative analysis of free phenolic compounds in mulberry leaves

From: Comparison of free and bound phenolic compositions and antioxidant activities of leaves from different mulberry varieties

Compound Molecular formula Expected m/z Observed m/z Mass error (ppm) RT (min) Fragment ions (relative intensity, %)
BeA C7H6O2 121.0295 121.0294  − 0.83 7.3186 121.02985 (100%), 77.04045 (14.2%), 82.49994 (1.9%)
PrA C7H6O4 153.0193 153.0194 0.65 7.9276 153.01923 (100%), 153.04488 (3.3%), 109.02855 (2.6%)
GaA C7H6O5 169.0142 169.0145 1.77 3.4645 169.01408 (100%), 125.02387 (3.3%), 61.7975 (2.5%)
CaA C9H8O4 179.0350 179.0351 0.56 7.6609 179.03479 (100%), 135.04578 (5.3%)
Sco C10H8O4 191.0350 191.0350 0 9.9880 191.03455 (100%), 176.01178 (9.3%), 147.02908 (3.5%)
Epi C15H14O6 289.0718 289.0678  − 13.84 2.2628 243.0616 (100%), 289.06708 (41.6%), 244.06404 (12.5%)
Que C15H10O7 301.0354 301.0356 0.66 13.8163 301.03537 (100%), 178.99699 (6.5%), 151.00305 (4.4%), 63.02433 (2.1%)
ChA C16H18O9 353.0878 353.0865  − 3.8 6.7420 191.05605 (100%), 192.05885 (8.7%)
Iso C21H20O12 463.0882 463.0903 4.53 8.6035 463.08832 (100%), 301.03555 (3%)
Rut C27H30O16 609.1461 609.1478 2.79 8.9101 609.14642 (100%), 609.18945 (9%), 300.02475 (2.2%)
Ast C21H20O11 447.0933 447.0942  − 2.01 10.6400 447.0932 (100%), 285.0388 (18.98%), 449.0994 (8.2%)
  1. All spectra were recorded in negative ion mode with a collision energy of 10 V