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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1⋯O2i	0.87 (2)	2.21 (2)	3.081 (2)	174 (2)
O2—H2⋯O4ii	0.82	1.76	2.572 (2)	172
C2—H2A⋯O1iii	0.93	2.63	3.536	166
C5—H5⋯O3iv	0.93	2.69	3.333	127

Symmetry codes: (i) ; (ii) ; (iii) ; (iv) .