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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N3—H3A⋯O1	0.86	2.01	2.735 (4)	141
N4—H4B⋯O1i	0.88 (2)	2.18 (2)	3.022 (5)	162 (4)

Symmetry code: (i) .