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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1D⋯I1i	0.91	2.88	3.598 (5)	137
N1—H1E⋯I1iii	0.91	2.84	3.619 (6)	144
N1—H1E⋯I2iv	0.91	3.12	3.672 (6)	121
N1—H1C⋯I2	0.91	2.78	3.611 (6)	152

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