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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1A⋯O2i	0.86	1.78	2.636 (3)	179
N2—H2A⋯O3	0.86	1.81	2.667 (3)	172
O1W—H1WA⋯O3	0.74 (5)	2.11 (5)	2.822 (4)	160 (5)
O1W—H1WB⋯O1W ii	0.81 (4)	1.95 (4)	2.751 (4)	173 (4)

Symmetry codes: (i) ; (ii) .