Table 2. Hydrogen-bond geometry (Å, °) for (I) .

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1⋯O21	0.867 (19)	1.983 (19)	2.6377 (16)	131.5 (16)
N1—H1⋯O21i	0.867 (19)	2.381 (19)	3.0823 (18)	138.3 (16)

Symmetry code: (i) .