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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O2W—H2W1⋯O4	0.85	2.21	2.834 (6)	130
O2W—H2W2⋯O2i	0.85	2.14	2.957 (6)	161
O1W—H1W1⋯O1ii	0.85	2.00	2.793 (5)	154
O1W—H1W2⋯O3iii	0.85	2.19	2.864 (6)	136

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