| D—H···A | D—H | H···A | D···A | D—H···A |
| N4—H4N···O6 | 0.88 (2) | 1.97 (2) | 2.849 (2) | 171.9 (19) |
| N3—H3N···N6 | 0.83 (2) | 2.00 (2) | 2.705 (2) | 141.8 (19) |
| O6—H6A···O3i | 0.82 (4) | 2.32 (4) | 3.119 (3) | 168 (4) |
| O6—H6B···O2ii | 0.73 (4) | 2.44 (4) | 3.143 (3) | 164 (4) |
| O6—H6B···O1ii | 0.73 (4) | 2.62 (4) | 3.248 (3) | 146 (4) |
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