Table 1.
HPLC-PAD-MS data [Retention time (Rt), ultraviolet (UV) and detected ions (LC-MS ions)] and MS/MSn data of compounds identified in Bauhinia holophylla.
| Peak (ID) | Compound | Rt (min) | UV-vis (λmax/nm.) | LC-MS ions [M-H]− | MS/MSn | Tentatively assignments |
|---|---|---|---|---|---|---|
| 1 | myricetin-O-hexoside | 13.83 | 358/308sh/263 | 479.3 | 958, 316.7 | UV/MS |
| 2 | myricetin-O-pentoside | 16.51 | 363/268 | 449.1 | 898.5, 316.9 | UV/MS |
| 3 | myricetin-O-deoxyhexoside | 17.43 | 352/256 | 463.8 | 316.5 | UV/MS |
| 4 | quercetin-O-hexoside | 17.60 | 354/303sh/255 | 463.8 | 301.2 | UV/MS |
| 5 | quercetin-O-xilopyranoside | 18.11 | 354/254 | 433.5 | 300.9 | UV/MS |
| 6 | quercetin-O-pentoside | 19.09 | 354/255 | 433.3 | 300.9 | UV/MS |
| 7 | quercetin-O-pentoside | 20.74 | 354/256 | 433.6 | 300.4 | UV/MS |
| 8 | quercetin-O-deoxyhexoside | 21.85 | 352/256 | 447.0 | 300.6 | UV/MS |
| 9 | kaempferol-O-pentoside | 23.07 | 361/263 | 417.2 | 285.4 | UV/MS |
| 10 | luteolin-deoxyhexose | 26.02 | 344/255 | 431.5 | 285.2 | UV/MS |
| 11 | Quercetin | 26.86 | 370/255 | 301.3 | 179,151, 137 | UV/MS |
| 12 | Luteolin | 29.08 | 350/253 | 285.3 | – | UV/MS |
| 13 | Isorhamnetin | 30.12 | 366/264 | 315.4 | 301.1 | UV/MS |
Peak data correspond with peak numbers in Figure 1.