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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H2⋯O6i	0.84 (5)	2.41 (2)	3.230 (7)	165 (6)
N5—H5⋯O2ii	0.85 (5)	2.14 (3)	2.940 (6)	158 (6)
N7—H7⋯O2ii	0.85 (2)	2.06 (2)	2.869 (5)	160 (6)
O1w—H11⋯O5	0.86 (9)	2.09 (7)	2.862 (9)	149 (12)
O1w—H12⋯O6	0.86 (9)	2.05 (8)	2.784 (12)	143 (13)

Symmetry codes: (i) ; (ii) .