Table 1 Identification of constituents from the Fr-BuVT of V. tucanorum via LC-MS in negative mode
Peak | Retention time (min) | Molecular ion (m/z) [M-H]− | MS/MS ions (m/z) | Putative compound | Ref. |
|---|---|---|---|---|---|
1 | 19.52 | 385 | – | NI | – |
2 | 22.11 | 461 | 299, 285, 283, 223 | Luteolin metil ether O-hexoside | [9] |
3 | 28.14 | 447 | 285 | Luteolin O-hexoside | [9] |
4 | 32.97 | 637 | – | NI | – |
5 | 36.47 | 727 | – | NI | – |
6 | 37.75 | 711 | 503 | NI | – |
7 | 40.04 | 665 | 503, 241 | Tetrahydroxy oleanoic acid O-hexoside (Arjunglucoside I) | |
8 | 49.97 | 519 | 501, 409, 301 | Pentahydroxy oleanoic acid (Bellericagenin B) | [26] |
9 | 54.44 | 503 | 485, 457, 409, 393 | Tetrahydroxy oleanoic acid (Sericic acid) | [27] |
10 | 55.49 | 571 | 503, 241 | Tetrahydroxy oleanoic acid derivative | [27] |
11 | 59.74 | 571 | 503 | NI | – |