Table 3.
Identified ellagic acids (EA) and ellagitannins (ET)
| Ret. time (min) |
Tentative ID | Observed [M-H]- | Major fragments | Chemical formula | Δ ppm | Fold changea |
|---|---|---|---|---|---|---|
| Ellagic acid derivatives | ||||||
| 8.57 | EA pentoside | 433.0388 | 300.9983 | C19H14O12 | −5.8 | −1.07 |
| 8.90 | Ellagic acidb | 300.9978 | 229.0134 | C14H6O8 | −3.9 | 1.43 |
| 9.87 | Methyl EA | 300.9978 | 300.9940 | C15H8O8 | 0.95 | 1.39 |
| 10.12 | Acylated methyl EA pentoside | 489.0667 | 315.0136 | C22H18O13 | −1.6 | −1.1 |
| 10.97 | Malonyl methyl EA pentoside | 531.0773 | 315.0136 | C24H20O14 | −1.3 | −1.13 |
| Ellagitannins | ||||||
| 3.92 | Unknown ET | 484.0263 (−2H) | 300.9995 | C44H26O26 | 4.1 | −17.1 |
| 3.92 | Unknown ET | 473.0354 (−2H) | 300.9991 | C42H28O26 | 1.8 | −8.3 |
| 4.45 | Unknown ET | 480.0432 (−2H) | 300.9970 | C43H30O26 | −0.74 | −4.9 |
| 4.68 | Sanguiin H4 | 633.0738 | 300.9985 | C27H22O18 | 0.79 | - |
| 5.54 | Unknown ET | 587.0564 (−2H) | 300.9989 | C55H36O30 | −1.5 | 9.5 |
| 6.63 | Unknown ET | 587.0568 (−2H) | 300.9994 | C55H36O30 | −0.85 | 5.2 |
| 7.34 | Unknown ET | 587.0575 (−2H) | 300.9984 | C55H36O30 | 0.34 | 5.1 |
aMean abundance in nectar vs BRB powder, fold change shown for compounds with P<0.05, Identified level Ib, IIc, IIId, according to the Metabolomics Standards Initiative