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Theoretical and experimental interring NOE distances (Å) for 6 and 7.
| 6 | 7 | ||||||
| C | D | Theoretical | NMR | Theoretical | NMR | ||
| H1 | H4 | 2.3 | 2.8 | 2.4 | 2.9 | ||
| H1 | H61/2 | 2.9 | 2.8 | 2.7 | 2.8 | ||
| D | E | 1C4 | 2SO | NMR | 1C4 | 2SO | NMR |
| H1 | H2 | 4.6 | 4.8 | 4.2 | 4.9 | 4.8 | N/A |
| H1 | H3 | 2.4 | 2.7 | 2.5 | 2.5 | 2.7 | 2.7 |
| H1 | H4 | 2.5 | 2.5 | 3.3 | 2.3 | 2.6 | 2.7 |
| H5 | H4 | 3.1 | 3.2 | 2.7 | 3.4 | 3.2 | na |
| E | F | 1C4 | 2SO | NMR | 1C4 | 2SO | NMR |
| H1 | H3 | 3.2 | 4.3 | na | 3.1 | 3.2 | 2.6 |
| H1 | H4 | 2.3 | 2.3 | 2.7 | 2.3 | 2.4 | 2.6 |
| H1 | H61/2 | 3.0 | 3.0 | 2.7 | 2.9 | 2.9 | 2.7 |
