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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H2B⋯O2	0.898 (10)	1.90 (2)	2.644 (3)	139 (2)
O2—H2⋯O1i	0.82	1.85	2.651 (3)	165

Symmetry code: (i) .