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Puckering parametersa for the five-membered furanose ring and the five-membered 1,3-dioxolane ring in compounds 8 and 9.
| Ring | Parameter | Compound | |
| 8 | 9 | ||
| Furanose | Q (Å) | 0.3467(16) | 0.3206(16) |
| Φ (°) | 8.1(3) | 353.8(9) | |
| 1,3-Dioxolane | Q (Å) | 0.3299(16) | 0.2146(16) |
| Φ (°) | 155.1(3) | 332.9(4) | |
aStandard deviations in parentheses.
