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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H2⋯O2i	0.899 (18)	2.368 (19)	3.2377 (14)	162.8 (15)
N1—H1⋯O1ii	0.877 (17)	2.032 (17)	2.9019 (14)	171.3 (15)

Symmetry codes: (i) ; (ii) .