Table 1. Hydrogen-bond geometry (Å, °) for (I) .
| D—H⋯A | D—H | H⋯A | D⋯A | D—H⋯A |
|---|---|---|---|---|
| C3—H3A⋯N2i | 0.95 | 2.64 | 3.462 (5) | 146 |
| C6—H6A⋯N1ii | 0.95 | 2.75 | 3.493 (5) | 136 |
Symmetry codes: (i) 
; (ii) 
.
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