Table 1. Selected bond lengths (Å).
| O1—C7 | 1.2529 (17) |
| C7—C8 | 1.4382 (19) |
| C8—C11 | 1.402 (2) |
| C11—N3′ | 1.311 (5) |
| C11—N3 | 1.359 (2) |
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