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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O2—H2B⋯O5	0.82	1.87	2.674 (3)	168
O3—H3A⋯O1i	0.82	1.85	2.665 (2)	169
N2—H2A⋯O2ii	0.86	2.36	3.196 (3)	164
O4—H4B⋯O1	0.85	2.12	2.960 (4)	171
O5—H5A⋯O4iii	0.85	1.99	2.816 (4)	163
O5—H5B⋯O3iv	0.85	2.14	2.902 (3)	150

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