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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—H1⋯N1	0.82	1.92	2.644 (2)	146
O4—H4B⋯O2i	0.853 (9)	2.072 (10)	2.924 (2)	176 (2)
O4—H4A⋯N3ii	0.861 (9)	1.971 (10)	2.832 (2)	178 (2)
N2—H2⋯O4iii	0.903 (9)	2.024 (11)	2.915 (2)	169 (2)

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