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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—H2W⋯O3	0.84 (3)	1.90 (3)	2.734 (2)	170 (3)
O1—H1W⋯O3i	0.79 (3)	1.90 (3)	2.683 (2)	171 (3)
O2—H3W⋯O4ii	0.85 (3)	1.86 (3)	2.701 (2)	172 (3)
O2—H4W⋯O4iii	0.82 (3)	1.95 (3)	2.754 (2)	167 (3)

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