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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H2A⋯O4i	0.89	2.14	2.936 (2)	148
N2—H2B⋯O4ii	0.89	2.24	3.007 (3)	144
N2—H2C⋯O1iii	0.89	1.98	2.842 (2)	161

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