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| δ (ppm) | assignment | δ (ppm) | assignment |
|---|---|---|---|
| 8.68 | 6′(IPA-COOH) | 4.19 | 1′b(IPA-NPG-OH) |
| 8.64 | 6(IPA) | 3.49 | 1″(free NPG) |
| 8.18 | 7(IPA) | 3.41 | 1a(IPA-NPG-OH) |
| 7.48 | 8(IPA) | 3.33–3.31 | 1′a(FA/MA-NPG-OH) |
| 6.83 | 10(FA) | 1.20–0.85 | 3, 3′, 3″ |
| 6.23 | 12(MA) | 1.00 | 3′(IPA-NPG-OH) |
| 4.32–3.90 | 1, 1a, 1b, 1′b | 0.90 | 3″(free NPG) |
