Table 1. Hydrogen-bond geometry (Å, °).
| D—H⋯A | D—H | H⋯A | D⋯A | D—H⋯A |
|---|---|---|---|---|
| O1—H1⋯N1i | 0.85 | 1.94 | 2.791 (2) | 172 |
| N1—H1B⋯O1i | 0.91 | 2.28 | 3.135 (2) | 156 |
| N1—H1A⋯O1ii | 0.87 | 2.19 | 3.0585 (17) | 175 |
Symmetry codes: (i) 
; (ii) 
.
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