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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1N1⋯O2i	0.88 (1)	2.02 (1)	2.885 (2)	167 (2)
N1—H1N2⋯O3ii	0.88 (1)	2.06 (2)	2.792 (2)	140 (2)
O5—H5O⋯O1	0.84 (1)	1.79 (1)	2.607 (2)	164 (3)
O7—H7O⋯O2iii	0.84 (1)	1.85 (1)	2.659 (2)	160 (3)

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