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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—H11⋯N5i	0.85	1.91	2.764 (2)	177
O1—H12⋯N4ii	0.85	2.00	2.823 (2)	162
C2—H2⋯O1iii	0.93	2.56	3.362 (3)	145

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