Table 2.
MS/MS fragment annotations of gramiketide A spectrum.
| m/z (Native) | Rel. Abundance | Formula | Formal Loss | m/z Fully 13C | |
|---|---|---|---|---|---|
| Precursor | 521.30902 | 0.01 | C29H45O8 | - | 549.40291 |
| Fragment 1 | 485.28986 | 0.51 | C29H41O6 | H4O2 | 514.38706 |
| Fragment 2 | 467.27933 | 0.22 | C29H39O5 | H6O3 | 496.37649 |
| Fragment 3 | 453.26367 | 0.11 | C28H37O5 | CH8O3 | 481.35749 |
| Fragment 4 | 267.12268 | 0.10 | C14H19O5 | C15H26O3 | 281.16967 |
| Fragment 5 | 211.06017 | 1.00 | C10H11O5 | C19H34O3 | 221.09365 |
| Fragment 6 | 197.04457 | 0.53 | C9H9O5 | C20H36O3 | 206.07464 |
| Fragment 7 | 183.02893 | 0.22 | C8H7O5 | C21H38O3 | 191.05564 |
| Fragment 8 | 179.03395 | 0.71 | C9H7O4 | C20H38O4 | 188.06408 |
| Fragment 9 | 165.01833 | 0.13 | C8H5O4 | C21H40O4 | 173.04507 |
| Fragment 10 | 145.1013 | 0.11 | C11H13 | C18H32O8 | 156.13808 |
| Fragment 11 | 133.10135 | 0.26 | C10H13 | C19H32O8 | 143.13473 |
| Fragment 12 | 131.03407 | 0.18 | C5H7O4 | C24H38O4 | 136.05066 |
| Fragment 13 | 113.02368 | 0.36 | C5H5O3 | C24H40O5 | 118.04009 |
| Fragment 14 | 67.01859 | 0.22 | C4H3O | C25H42O7 | 71.03126 |