Table I.
HRMS information of biflavone substances.
| Substancesa | Retention time | Measured molecular mass | Actual molecular mass | Molecular formula | Error m/z (ppm) | Molecular fragment |
|---|---|---|---|---|---|---|
| 1 | 17.8 | 751.1505 | 751.1510 | C36H31O18 | −0.7 | 151.0031, 285.0392, 435.0708, 437.0866, 445.0556 |
| 2 | 18.6 | 735.1564 | 735.1561 | C36H31O17 | +0.4 | 125.0237, 269.0448, 403.0818, 429.0609, 447.0717 |
| 3 | 24.6 | 589.0972 | 589.0982 | C30H22O13 | −1.7 | 125.0237, 151.0028, 285.0393, 435.0713, 463.0660 |
| 4 | 26.6 | 573.1043 | 573.1033 | C30H22O12 | +1.7 | 125.0237, 296.0313, 419.0761, 447.0711 |
| 5 | 32.7 | 557.1084 | 557.1083 | C30H22O11 | +0.1 | 125.2038, 269.0443, 296.0317, 403.0813, 431.0764 |
a
Corresponding to the structure of number of substances as shown in Fig. 2. HRMS, high resolution mass spectrometry.