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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—H1⋯N1	0.82	1.86	2.578 (4)	146
O3—H3⋯O2i	0.82	1.83	2.642 (4)	173
O4—H4A⋯O3ii	0.847 (10)	2.038 (14)	2.878 (4)	171 (5)
O4—H4B⋯O1i	0.851 (10)	2.24 (3)	2.969 (5)	144 (4)
N2—H2⋯O4iii	0.898 (10)	2.01 (2)	2.874 (5)	162 (5)

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