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Retention time and molecular ion mass (m/z) of three marker compounds obtained from LC-ESI-QTOF-MS.
| Peak no. | retention time (tR, min) | m/z, [M-H]− | compounds |
|---|---|---|---|
| 1 | 7.44 | 353.0737 | caffeoylquinic acid |
| 2 | 8.75 | 353.0737 | chlorogenic acid |
| 3 | 10.39 | 179.0239 | caffeic acid |
