Table 3.
Predicted molecular formulas of the novel derivatives based on mass spectrometric fragmentation experiments and the difference of these molecular formulas compared to Ybt.
| m/z of the [M+H]+ Ion | Predicted Molecular Formula of M | Difference of the Predicted Molecular Formula to Ybt |
|---|---|---|
| 482.1239 (Ybt) | C21H27N3O4S3 | - |
| 498.1188 (1) | C21H27N3O5S3 | O |
| 601.1282 (2) | C24H32N4O6S4 | C3H5NO2S |
| 615.1433 (3) | C25H34N4O6S4 | C4H7NO2S |
| 633.1003 (4) | C24H32N4O6S5 | C3H5NO2S2 |
| 587.1127 (5) | C23H30N4O6S4 | C2H3NO2S |
| 530.0911 (6) | C21H27N3O5S4 | OS |
| 508.1391 (7) | C23H29N3O4S3 | C2H2 |