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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N6—H6B⋯N5	0.89	2.29	2.897 (4)	125
N6—H6B⋯O3i	0.89	2.39	2.989 (4)	124
O1—H1A⋯O4	0.85	2.16	2.782 (4)	130
O1—H1B⋯O2ii	0.85	2.22	2.983 (4)	150
O1—H1B⋯O5ii	0.85	2.58	3.284 (5)	141

Symmetry codes: (i) ; (ii) .