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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1A⋯O4	0.86	2.09	2.946 (4)	170
N1—H1B⋯O3	0.86	2.03	2.869 (5)	163
N3—H3B⋯O4	0.86	2.10	2.919 (4)	158
N3—H3A⋯O1i	0.86	2.31	3.081 (4)	150

Symmetry code: (i) .