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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H2A⋯O3i	0.90	2.14	2.9963 (17)	159
O1—H1⋯O4ii	0.93	2.28	3.1256 (16)	152
N2—H2B⋯O4iii	0.90	2.58	3.3356 (18)	141
N1—H2⋯O4iv	0.92 (2)	2.49 (2)	3.2449 (18)	139.8 (18)

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