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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—H1A⋯I2i	0.84	2.76	3.500 (6)	148
O1—H1B⋯I1ii	0.84	2.73	3.490 (6)	152
N2—H2N⋯I2iii	0.92	2.77	3.681 (7)	172
N5—H5N⋯I2iv	0.92	2.80	3.710 (6)	173

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