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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N4—H4D⋯O1W	0.93 (2)	2.00 (2)	2.924 (3)	170.9 (18)
N4—H4E⋯O3Wi	0.88 (2)	2.21 (2)	3.078 (3)	168.3 (18)
N8—H8E⋯O2Wii	0.93 (3)	2.23 (3)	3.104 (3)	156 (2)
O1W—H1WA⋯O2Wiii	0.84 (3)	1.95 (3)	2.793 (3)	173 (3)
O1W—H1WB⋯O3Wiv	0.92 (3)	1.93 (3)	2.810 (2)	160 (3)
O2W—H2WA⋯N2	0.87 (3)	2.02 (3)	2.885 (2)	171 (2)
O2W—H2WB⋯N5	0.90 (3)	1.93 (3)	2.816 (2)	168 (2)
O3W—H3WA⋯N1	0.88 (2)	1.92 (2)	2.787 (2)	168 (2)
O3W—H3WB⋯N6	0.89 (3)	1.93 (3)	2.827 (2)	176 (2)

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