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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1B⋯O2	0.90	1.91	2.795 (3)	169
N1—H1A⋯O1i	0.90	1.93	2.820 (3)	169

Symmetry code: (i) .