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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N9—H9A⋯I5	0.89	2.84	3.67 (2)	156
N9—H9B⋯I2iii	0.89	2.90	3.68 (2)	147
N9—H9C⋯I5iv	0.89	2.89	3.64 (2)	143

Symmetry codes: (iii) ; (iv) .