Table 2. Hydrogen-bond geometry (Å, °).

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1⋯O1W i	0.98	2.28	3.115 (6)	143
N2—H2⋯O1W ii	0.98	2.10	3.020 (6)	156
N3—H3⋯O2W i	0.98	2.15	3.083 (7)	159
N4—H4⋯O2W iii	0.98	2.26	3.080 (6)	140
O1W—H1WA⋯N8	0.85	2.03	2.872 (7)	173
O1W—H1WB⋯N6iv	0.85	2.27	3.112 (7)	171
O2W—H2WA⋯N6	0.85	2.03	2.853 (6)	164
O2W—H2WB⋯N8i	0.85	2.30	3.149 (7)	175

Symmetry codes: (i) -x, -y+1, -z+1; (ii) x, y, z-1; (iii) x, y-1, z; (iv) -x, -y+2, -z+1.