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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O6—H6⋯N4i	0.82	2.07	2.851 (4)	158
O3—H3⋯N6ii	0.82	2.04	2.782 (5)	150

Symmetry codes: (i) ; (ii) .