Table 2. Hydrogen-bond geometry (Å, °).

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O3—H31⋯O2iii	0.88 (1)	1.83 (1)	2.7028 (16)	175 (2)
O3—H32⋯O1iv	0.84 (2)	2.54 (2)	2.9083 (17)	108 (2)
N3—H1⋯O2	0.86	2.08	2.7229 (17)	131
N3—H2⋯N2v	0.86	2.30	3.1278 (19)	162

Symmetry codes: (iii) ; (iv) ; (v) .