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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1N⋯O4	0.84 (4)	2.05 (3)	2.699 (3)	133 (2)
C1—H1B⋯O3i	0.96	2.57	3.480 (4)	158
C9—H9⋯O5i	0.93	2.59	3.429 (4)	150

Symmetry code: (i) .