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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—H1⋯N1	0.82	1.78	2.597 (2)	171
N2—H2A⋯O2	0.86	2.09	2.914 (2)	161
N2—H2B⋯O1i	0.86	2.14	2.954 (2)	157

Symmetry code: (i) .