Table 2.
NMR data of sugar moieties
| C Shift [ppm] | H Shift [ppm] | Multiplicity | Coupling [Hz] | |
|---|---|---|---|---|
| Fraction 64–65 (sugar A) | ||||
| –C1H–O– | 91.2 | 5.33 | nd | <1.5 |
| –C2H– (acylated C′ 173.1) | 73.3 | 4.80 | dd | 7.8 |
| –C3H– (acylated C′ 173.5) | 74.2 | 5.46 | dd | 7.8, 9.3 |
| –C4H– | 69.9 | 3.613 | dd | 9.3, 9.6 |
| –C5H– | 72.5 | 3.93 | m | 9.6, 11.9, 5 |
| –C6aH– | 62.5 | 3.83 | m | 12.0, 2.6 |
| –C6bH– | 3.76 | m | 12.0, 5.2 | |
| Fraction 64–65 (sugar B) | ||||
| –C1H–O– | 93.8 | 5.17 | d | 3.9 |
| –C2H– | 72.1 | 3.55 | nd | >7 |
| –C3H– (acylated C’ 174.0) | 72.3 | 5.23 | nd | >7 |
| –C4H– | 73.6 | 3.51 | nd | >7, >7 |
| –C5H– | 70.4 | 4.09 | dd | 10.1 |
| –C6aH– (acylated C’ 173.7) | 64.8 | 4.39 | m | nd |
| –C6bH– | 4.30 | m | nd | |
| Fraction 64–65 (sugar C) | ||||
| –C1H–O– | 96.1 | 4.75 | d | 7.8 |
| –C2H– | 74.6 | 4.83 | dd | 7.8, >9 |
| –C3H– (acylated C’ 173.5) | 77.1 | 5.11 | dd | > 9, >9 |
| –C4H– | 69.7 | 3.62 | dd | > 9 |
| –C5H– | 77.7 | 3.42 | Overlap | nd |
| –C6aH– | 62.6 | 3.73 | Overlap | nd |
| –C6bH– | 3.89 | Overlap | nd | |
| Fraction 64–65 (sugar D) | ||||
| –C1H–O– | 98.0 | 4.60 | d | 7.5 |
| –C2H– | 74.3 | 3.33 | dd | 7.5, >8 |
| –C3H– (acylated C’ 173.7) | 79.2 | 4.97 | dd | > 9, >9 |
| –C4H– | 69.9 | 3.52 | >8 | |
| –C5H– | 75.0 | 3.60 | nd | |
| –C6aH– (acylated C’ 173.7) | 64.8 | 4.26 | nd | |
| –C6bH– | 4.44 | nd | ||
| Subfraction 63–65 E (talose) | ||||
| –C1H–O– | 102.1 | 4.92 | d | 4.0 |
| –C2H– | 77.5 | 4.03 | dd (overlap) | 4, 4.4 |
| –C3H– | 76.3 | 4.26 | dd | 4.4, 4.4 |
| –C4H– | 77.1 | 4.03 | dd (overlap) | |
| –C5H– | 70.6 | 3.86 | m | 7.3, 6.0, 3.7 |
| –C6aH– | 63.2 | 3.63 | dd | 11.5, 6.0 |
| –C6bH– | 63.2 | 3.76 | dd | 11.5, 3.7 |
| Subfraction 63–65 E (acylated talose) | ||||
| –C1H–O– | 109.0 | 4.76 | <1 | |
| –C2H– | 79.7 | 4.05 | <2 | |
| –C3H– | 75.9 | 4.12 | Overlap | |
| –C4H– | 81.2 | 4.13 | Overlap | |
| –C5H– | 70.5 | 3.91 | m | |
| –C6aH– | 63.8 | 3.68 | dd | 11.6, 6.0 |
| –C6bH– | 63.8 | 3.82 | dd | 11.6, 3.3 |
Chemical shifts of carbon and hydrogen nuclei, multiplicity of the peak observed and its coupling constant from four different glucose lipids (sugar A, B, C and D) present in fraction 64–65, and two talose units present in subfraction 63–65 E. Values are given for the dominant sugar conformations of each sugar moiety
d doublet, m multiplet, nd not determinable