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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H2⋯O3i	0.838 (17)	2.060 (18)	2.885 (3)	168 (3)
O5—H5A⋯O3	0.810 (16)	2.042 (18)	2.844 (2)	171 (3)
O5—H5B⋯O4ii	0.819 (16)	1.797 (17)	2.609 (2)	171 (3)
O6—H6A⋯O3iii	0.829 (17)	2.047 (19)	2.863 (2)	167 (3)
O6—H6B⋯O4iv	0.812 (17)	1.91 (2)	2.706 (3)	164 (3)

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