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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1N⋯O1W	0.84 (3)	1.86 (3)	2.699 (2)	174 (3)
N2—H2N⋯O2W	0.98 (3)	1.69 (3)	2.661 (3)	173 (3)
O1W—H1W1⋯O1B i	0.84 (3)	1.86 (3)	2.685 (2)	167 (3)
O1W—H1W1⋯O3C i	0.84 (3)	2.07 (3)	2.826 (9)	149 (3)
O1W—H1W2⋯O3A	0.91 (4)	1.85 (4)	2.747 (2)	168 (4)
O2W—H2W1⋯O2A ii	0.86 (4)	1.88 (4)	2.739 (3)	176 (3)
O2W—H2W2⋯O1C	0.83 (5)	1.59 (5)	2.336 (10)	147 (4)
O2W—H2W2⋯O1B	0.83 (5)	2.01 (5)	2.830 (3)	169 (4)

Symmetry codes: (i) ; (ii) .