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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—H1⋯N1	0.93 (3)	1.93 (3)	2.829 (2)	162 (2)
N2—H2A⋯N3	0.86	2.03	2.873 (2)	168
N4—H4A⋯O1i	0.86	1.99	2.855 (2)	179

Symmetry code: (i) .