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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1A⋯O2i	0.90 (1)	2.217 (10)	3.108 (2)	170 (2)
O6—H6⋯N2ii	0.82	2.55	3.133 (2)	129
O6—H6⋯O3ii	0.82	2.02	2.807 (2)	161
O2—H2⋯O6iii	0.82	1.79	2.599 (2)	171
O1—H1⋯O3	0.82	1.80	2.534 (2)	148

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