Table 1. Hydrogen-bond geometry (Å, °).

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1A—H1A⋯O1B	0.86	2.13	2.982 (2)	172
N1B—H1B⋯O1Ai	0.86	2.14	2.991 (2)	173

Symmetry code: (i) .