| D—H···A | D—H | H···A | D···A | D—H···A |
| N2—H21···O2i | 0.91 (2) | 1.82 (2) | 2.728 (2) | 175 (2) |
| N2—H22···O1ii | 0.91 (2) | 1.78 (2) | 2.691 (2) | 172 (2) |
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