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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O2—H2⋯O1	0.83 (2)	1.83 (2)	2.6393 (16)	165 (2)
O3—H3⋯O2i	0.84	1.87	2.7010 (18)	171
N1—H1A⋯O1ii	0.969 (18)	1.789 (19)	2.738 (2)	165.7 (16)
N1—H1B⋯O1	0.93 (2)	1.91 (2)	2.8259 (19)	169 (2)

Symmetry codes: (i) ; (ii) .