Table 7.
Selected fragments caused by different NLs recorded during MS4 experiments of Ybt and its novel derivatives by application of LC-HRMS. All recorded fragmentation spectra are shown in the Supplementary Material. The specific NLs [X] refer to the NLs shown in Table 5 and Table 6. These NLs combined with the specific NLs [Y] listed in this table lead to the fragment ions [M-187-X-Y+H]+ listed on top of the columns.
|
m/z of [M-187-X+H]+
(M) |
Fragment [M-187-X-Y+H]+ | |||
|---|---|---|---|---|
| 120.0441 C7H6NO+ |
173.0709 C10H9N2O+ |
174.0547 C10H8NO2+ |
190.0320 C10H8NOS+ |
|
| 190.0319 (Ybt-A1/Ybt-A2) |
70 Da C3H2S |
- | - | - |
| 208.0426 (1-A) |
88 Da C3H4OS |
- | 34 Da H2S |
18 Da H2O |
| 293.0414 (2-A) 2 |
- | - | - | - |
| 295.0570 (3-A) 1 |
- | 122 Da C3H6OS2 |
- | - |
| 293.0412 (3-A) 1 |
- | 120 Da C3H4OS2 |
- | - |
| 261.0690 (4-A) |
- | 88 Da C3H4OS |
- | - |
| - -(6-A) 2 |
- | - | - | - |
| - -(7-A1–3) 2 |
- | - | - | - |
1 3-A showed two intense ions used for MS4; 2 fragments were not observed during MS4.