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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1N⋯O2i	0.89 (2)	2.00 (2)	2.886 (2)	174 (2)
C2—H2⋯O2i	1.00	2.44	3.320 (2)	146
C4—H4⋯O1i	1.00	2.54	3.434 (2)	149
C9—H9⋯N2ii	0.95	2.57	3.272 (3)	131

Symmetry codes: (i) x, -y+{\script{1\over 2}}, z-{\script{1\over 2}}; (ii) -x+1, y-{\script{1\over 2}}, -z+{\script{1\over 2}}.