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Selected bond lengths (Å) for the crystal structure of 30-diethoxyphosphoryloxybetulin 5 and 28-cyclopropylpropynoyl-29-diethoxyphosphorylbetulin 13.
| Compound | Lengths of Selected Bonds [Å] | ||
|---|---|---|---|
| C20–C29 | C20–C30 | C20–C19 | |
| 30-diethoxyphosphoryloxybetulin 5 | 1.326(5) | 1.490(5) | 1.503(5) |
| 28-cyclopropylpropynoyl- 29-diethoxyphosphorylbetulin 13 [7] |
1.338(3) | 1.515(3) | 1.514(3) |
