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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—H9⋯N2i	0.89 (2)	1.92 (2)	2.8047 (17)	175
C2—H2⋯O1ii	0.93	2.59	3.5019 (17)	166

Symmetry codes: (i) ; (ii) .