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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C9—H9⋯O3i	0.957 (19)	2.455 (19)	3.2702 (18)	142.9 (15)
C7—H7B⋯O3ii	0.96	2.40	3.2434 (18)	146
N2—H2A⋯O3i	0.87 (2)	2.07 (2)	2.9219 (16)	163.2 (18)

Symmetry codes: (i) ; (ii) .