| D—H···A | D—H | H···A | D···A | D—H···A |
| N1—H1A···O1ii | 0.84 (4) | 2.10 (4) | 2.897 (3) | 158 (3) |
| N2—H2A···O2 | 0.88 (3) | 2.15 (3) | 3.013 (3) | 168 (3) |
| N2—H2B···N2iii | 0.81 (4) | 2.26 (4) | 3.076 (3) | 179 (3) |
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