Table 4.
Chromatographic peaks of aureolic acid family in the LC–MS/MS profile of the strain RG38T.
| Peak | tR (min) | Precursor ion m/z ([M-H]−) | Molecular formula | Error (ppm) | MS/MS fragments | Compounds |
|---|---|---|---|---|---|---|
| A | 9.22 | 1139.4943 | C55H80O25 | 2.9 | 991, 544, 341, 269 | Deacetyl- chromomycin A3 |
| B | 9.47 | 1139.4927 | C55H80O25 | 1.5 | 991, 675, 586, 341, 269 | Deacetyl-chromomycin A3 |
| C | 10.16 | 1167.5295 | C57H84O25 | 6.2 | 1,019, 745, 544, 341, 269 | Deacetyl-chromomycin A2 |
| D | 10.26 | 1167.5228 | C57H84O25 | 0.4 | 1,019, 745, 544, 341, 269 | Deacetyl-chromomycin A2 |
| E | 10.59 | 1181.5090 | C57H82O26 | 6.3 | 1,033, 717, 586, 341, 269 | Chromomycin A3 (2) |
| F | 11.12 | 1195.5192 | C58H84O26 | 1.6 | 1,047, 731, 586, 572, 341, 269 | Demethyl chromomycin A2 |
| G | 11.54 | 1209.5333 | C59H86O26 | 0.3 | 1,061, 586, 341, 269 | Chromomycin A2 (1) |