| D—H···A | D—H | H···A | D···A | D—H···A |
| N2—H2′···O1i | 0.85 (2) | 2.10 (2) | 2.935 (5) | 171 (4) |
| N4—H4′···O2ii | 0.86 (2) | 2.05 (2) | 2.894 (5) | 166 (4) |
| N6—H6′···O3iii | 0.86 (2) | 2.30 (2) | 3.164 (5) | 174 (4) |
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