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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1⋯O1i	0.86	2.04	2.839 (4)	155
C2—H2⋯O1ii	0.93	2.66	3.581 (6)	172

Symmetry codes: (i) ; (ii) .