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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1W—H1W⋯I1i	0.85 (3)	2.71 (2)	3.5498 (12)	176 (2)
O1W—H2W⋯I1ii	0.86 (3)	2.75 (3)	3.6055 (13)	171 (2)
C3—H3A⋯O1W iii	0.95	2.35	3.2072 (19)	150

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