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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1W—H2W⋯O2i	0.84 (1)	1.97 (2)	2.798 (5)	168 (6)
O1W—H1W⋯N1ii	0.84 (1)	2.01 (1)	2.846 (6)	175 (6)
O2W—H3W⋯O3iii	0.84 (1)	1.99 (2)	2.810 (5)	166 (5)
O2W—H4W⋯N2iv	0.84 (1)	2.01 (1)	2.846 (6)	176 (5)

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