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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1A⋯O2i	0.81 (3)	2.33 (3)	2.992 (2)	139 (2)
N1—H1B⋯O4ii	0.75 (3)	2.30 (3)	3.045 (3)	172 (3)
N2—H1N⋯O5iii	0.93 (3)	2.01 (3)	2.866 (2)	151 (3)
N2—H2N⋯O1iii	0.92 (2)	1.97 (2)	2.858 (2)	163 (2)
N2—H3N⋯O5iv	0.83 (3)	1.95 (3)	2.770 (2)	171 (2)

Symmetry codes: (i) ; (ii) ; (iii) ; (iv) .