| D—H···A | D—H | H···A | D···A | D—H···A |
| C2—H2···N1i | 1.016 (17) | 2.550 (19) | 3.4052 (18) | 141.5 (13) |
| C3—H3···N2vi | 0.979 (18) | 2.525 (18) | 3.4822 (18) | 165.8 (13) |
| C4—H4···N4viii | 0.946 (19) | 2.642 (19) | 3.5677 (17) | 165.9 (14) |
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