Table 2.
Interpretations of ion peaks presented in ESI MS and MS2
| Composition of fragment | Molecular formula | Mol wt | Mass (negative) |
|---|---|---|---|
| CDP-d-xylulose (full scan) | |||
| CDP-d-xylulose-Na | C14H22O15N3P2Na | 557.27 | 556.09 |
| CDP-d-xylulose | C14H23O15N3P2 | 535.29 | 534.10 |
| CDP-d-xylulose (MS2-534.10) | |||
| CDP + H2O | C9H16N3O12P2 | 420.18 | 419.93 |
| CDP-d-xylulose minus CH2(OH)COCH2OH | C11H18O12N3P2 | 446.22 | 444.11 |
| CDP − PO3 | C9H14N3O8P | 323.19 | 322.00 |
| d-Xylulose-PO3 | C5H9O7P | 212.09 | 210.88 |
| d-Xylulose-PO3-PO3 | C5H10O10P2 | 292.07 | 290.76 |
| CDP-d-arabinitol (full scan) | |||
| CDP-d-arabinitol-Na | C14H24O15N3P2Na | 559.28 | 558.08 |
| CDP-d-arabinitol | C14H25O15N3P2 | 537.30 | 536.18 |
| CDP-d-arabinitol (MS2-536.18) | |||
| CDP − H2O | C9H12N3O10P2 | 384.15 | 383.96 |
| d-Arabinitol-PO3-PO2 | C5H14O9P2 | 280.10 | 279.15 |
| CDP − PO3 | C9H14N3O8P | 323.19 | 322.00 |
| d-Arabinitol-PO3 | C5H11O7P | 214.11 | 212.56 |