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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H2⋯O5	0.89 (1)	2.00 (2)	2.875 (4)	166 (4)
O1—H1⋯N1	0.82	2.03	2.737 (4)	143
O1—H1⋯O5i	0.82	2.51	2.952 (4)	115
O5—H5⋯O2ii	0.82	1.90	2.710 (4)	171

Symmetry codes: (i) ; (ii) .